Equations & Inequalities Chapter Questions
1. When given a set of possible solutions to an equation or inequality, how do you determine which are solutions?
2. What are inverse operations? Name them.
3. How do you solve equations?
4. How do we translate a statement into an inequality?
5. Explain the steps to graphing an inequality on a number line.
Solving Equations Chapter Problems
Determining Solutions to Equations
Classwork
1. Use the solution set to determine the solution to each equation.
a. x + 12 = 20 {5, 6, 7, 8}
b. x - 13 = 32 {43, 44, 45, 46}
c. 2x + 4 = 26 {9, 10, 11, 12}
d. 5y – 3 = 57 {9, 10, 11, 12}
e. 4x + 3 = 15 {3, 4, 5, 6}
f. 5p – 4 = 16 {3, 4, 5, 6}
g. 5g + 15 = 25 {1, 2, 3, 4}
h. 7h – 14 = 42 {8, 9, 10, 11}
Homework
2. Use the solution set to determine the solution to each equation.
a. x + 19 = 33 {12, 13, 14, 15}
b. x - 12 = 26 {35, 36, 37, 38}
c. 4x + 9 = 45 {7, 8, 9, 10}
d. 5y - 19 = 16 {5, 6, 7, 8}
e. 7g + 17 = 45 {4, 5, 6, 7}
f. 9h - 4 = 41 {3, 4, 5, 6}
g. 6m + 13 = 79 {8, 9, 10, 11}
h. 8x – 7 = 57 {5, 6, 7, 8}
Solving an Equation for a Variable
Classwork
3. Name the inverse operation needed to solve for the variable.
a. x + 9 = 17
b. y – 8 = 5
c. m + 5 = 21
d.
e. 9v = 108
Homework
4. Name the inverse operation needed to solve for the variable.
a. t – 18 = 54
b. 14x = 228
c. m + 19 = 51
d. 11b = 66
e.
5. When solving an equation, why do you apply the inverse of the given operation to both sides?
Solving One Step Equations with Addition and Subtraction
Classwork
6. Solve.
a. n + 7 = 20
b. x + 9 = 28
c. a + 15 = 27
d. y + 29 = 35
e. 50 + w = 92
f. 4 + m = 18
g. x – 6 = 15
h. y – 19 = 27
i. m – 56 = 32
j. x – 9 = 72
k. y – 17 = 56
l. z – 5 = 98
Homework
7. Solve.
a. n + 9 = 13
b. 14 + b = 21
c. z + 18 = 42
d. 7 + g = 63
e. 19 = 15 + y
f. b + 4 = 71
g. x – 7 = 16
h. y – 25 = 34
i. m – 19 = 39
j. y – 13 = 67
k. z – 43 = 57
l. x – 32 = 77
Solving One Step Equations with Multiplication and Division
Classwork
8. Solve.
a. 7x = 84
b. 30 = 12m
c. 5m = 25
d. 10c = 80
e. 13m = 143
f. 9y = 126
g. x5 = 13
h. y4 = 12
i. z8 = 10
j. x7 = 25
k. x9 = 45
l. y5 = 62
Homework
9. Solve.
a. 18x = 360
b. 17y = 51
c. 9p = 99
d. 15c = 75
e. 8r = 136
f. 6x = 108
g. x5 = 12
h. y4 = 13
i. z8 = 40
j. x7 = 35
k. x9 = 56
l. y5 = 26
Writing Equations
Classwork
Write the equation and solve for the unknown.
10. Larry has 14 toy cars. His grandparents give him some more toy cars. Now he has 22 toy cars. Write an equation that can be used to determine how many toy cars Larry’s grandparent’s give him.
11. Kenya did 16 pull-ups at the end of the month. This was 4 times as many pull-ups as she was able to do at the beginning of the month. Write an equation that can be used to find the number of pull-ups Kenya could do at the beginning of the month.
12. Tracy worked 28 hours this week. That was 3 hours less than Frank worked. Write an equation to figure out how many hours Frank worked.
13. During the school Walk-a-Thon, each class completed an average of 64 laps around the track. The school completed 832 laps all together. Write an equation to represent the number of classes that participated in the Walk-a-Thon.
Homework
Write the equation and solve for the unknown.
14. Jennifer bought 3 bags of trail mix to make snack packs. She made 18 snacks packs with the trail mix. Write an equation to represent the number of snack packs each bag of trail mix made.
15. Samantha, who is 3 years older than Francis, is 12. Write an equation to represent Francis’ age.
16. Frederick is half as tall as his older sister. His older sister is 62 inches tall. Write an equation to represent Frederick’s height.
17. Franco bought a bag of 25 jolly ranchers. After sharing with his friends, he had 13 left. Write an equation to represent the number of jolly ranchers he shared with his friends.
Writing Simple Inequalities
Classwork
18. Write an inequality for each sentence below.
a. y is less than 8.
b. f is greater than -5.
c. j is greater than or equal to 4.
d. The speed limit, s, cannot exceed 55 mph.
e. 10 is less than or equal to x.
f. A number, x is at least 15.
g. A number, h is not greater than 4.
h. x is not more than 20.
i. A number, z, is negative.
j. To have a passing grade, g, must exceed a 70.
k. k is less than or equal to -3.
l. The total, t, is fewer than 8 items.
m. -2 is less than a number, n.
n. The time, t, on your quiz cannot exceed 20 minutes.
o. At most, 4 students, s, will fail the test.
Homework
19. Write an inequality for each sentence below.
a. w is greater than 7.
b. p is less than or equal to -1.
c. m is less than 5.
d. 11 is greater than or equal to k.
e. A number, f is positive.
f. The total, t is fewer than 4 items.
g. 4 is less than a number, n.
h. The speed limit, s, cannot exceed 25 mph.
i. A number c is at least 12.
j. w is not more than 50.
k. g is more than or equal to 8.
l. h is not less than -5.
m. The time, t for lunch cannot exceed 30 minutes.
n. At most, 25 students, s, will be in the class.
o. To have an A in class, g, must exceed a 92.
Solutions to Simple Inequalities
Classwork
20. Use the solution set to determine the solutions to each inequality.
a. x < 17 {15, 16, 17, 18}
b. m > 9 {8, 9, 10, 11}
c. r < 9 {7, 8, 9, 10}
d. b 23 {21, 22, 23, 24}
e. m 27 {26, 27, 28, 29}
f. 3r > 18 {4, 5, 6, 7}
g. 8y 24 {2, 3, 4, 5}
h. 9x < 45 {4, 5, 6, 7}
Homework
21. Use the solution set to determine the solutions to each inequality.
a. y 14 {13, 14, 15, 16}
b. x < 16 {14, 15, 16, 17}
c. m 9 {8, 9, 10, 11}
d. g 13 {12, 13, 14, 15}
e. x < 32 {31, 32, 33, 34}
f. 4y 32 {6, 7, 8, 9}
g. 3g > 26 {12, 13, 14, 15}
h. 7m 56 {6, 7, 8, 9}
Graphing Solution Sets to Simple Inequalities
Classwork
22. Write an inequality for the graph below.
23. Write an inequality for the graph below.
24. Write an inequality for the graph below.
25. Write an inequality for the graph below.
26. Write an inequality for the graph below.
27. Write an inequality for the graph below.
28. Graph the solution for each inequality.
a. w > 7
b. p < -1
c. m < 5
d. 11 ≥ k
e. f > 0
f. t < 4
g. 4 < n
29. Write an inequality for each sentence below, and then graph the solutions of each inequality on a number line.
a. x is less than fifteen.
b. y cannot exceed twenty.
c. Twenty is less than or equal to m.
d. The cost, c, is more than $50.
e. Twelve is greater than or equal to b.
Homework
30. Write an inequality for the graph below.
31. Write an inequality for the graph below.
32. Write an inequality for the graph below.
33. Write an inequality for the graph below.
34. Write an inequality for the graph below.
35. Write an inequality for the graph below.
36. Graph the solution for each inequality
a. s 25
b. x ≥ 12
c. w 50
d. g ≥ 8
e. h ≥ -5
f. t 30
g. 25 ≥ s
37. Write an inequality for each sentence below, and then graph the solutions of each inequality on a number line.
a. y is greater than nine.
b. x is less than or equal to sixteen.
c. Nineteen is greater than m.
d. Your height, h, must exceed 42 inches.
e. The weight limit, w, is 225 pounds.
Equations and Inequalities Unit Review
1. Use the solution set to determine the solution to 4x = 68 {16, 17, 18, 19}
a. 16
b. 17
c. 18
d. 19
2. Use the solution set to determine the solution to 3x – 5 = 22 {7, 8, 9, 10}
a. 7
b. 8
c. 9
d. 10
3. Name the inverse operation used to solve this equation: x – 7 = 13
a. Multiplication
b. Division
c. Addition
d. Subtraction
4. Name the inverse operation used to solve this equation: x3 = 21
a. Multiplication
b. Division
c. Addition
d. Subtraction
5. Name the inverse operation used to solve this equation: 5x = 25
a. Multiplication
b. Division
c. Addition
d. Subtraction
6. Name the inverse operation used to solve this equation: x + 9 = 27
a. Multiplication
b. Division
c. Addition
d. Subtraction
7. Solve the equation: 12x = 96
a. x = 1152
b. x = 8
c. x = 9
d. x = 84
8. Solve the equation: y + 36 = 43
a. y = 7
b. y = 79
c. y = 8
d. y = 78
9. Solve the equation: p – 12 = 56
a. p = 44
b. p = 4
c. p = 5
d. p = 68
10. Solve the equation: x5 = 12
a. x = 7
b. x = 2
c. x = 60
d. x = 3
11. Translate into an inequality: A number, x, is less than 35.
a. x 35
b. x > 35
c. x 35
d. x < 35
12. Translate into an inequality: the speed, s, cannot exceed 55 mph.
a. s 55
b. s > 55
c. s 55
d. s 55
13. Translate into an inequality: the people in attendance at the concert, p, exceeds 1,200.
a. p 1,200
b. p > 1,200
c. p 1,200
d. p < 1,200
14. Translate into an inequality: the number 13, is less than or equal to the number of spots, s, on the dog.
a. s 13
b. s > 13
c. s 13
d. s < 13
15. Use the solution set to determine the solutions to: p 12 {10,11,12,13}
16. Use the solution set to determine the solutions to: 11r > 36 {2, 3, 4, 5}
17. Use the solution set to determine the solutions to: x – 32 4 {34, 35, 36, 37}
18. Use the solution set to determine the solutions to: y + 25 > 39 {12, 13, 14, 15}
19. James, who is 14, is three times younger than his father. Write and solve an equation to determine his father’s age.
20. A shipping company packs crates of milk. They packed 23 crates with 32 milk jugs each. Write and solve an equation to find the total number of milk jugs they packed.
21. Marcus has 19 his rare coin collection. His brother also collects rare coins. Together, they have 43 rare coins. Write and solve an equation to show how many coins are in his brother’s collection.
22. Write the inequality for the graph below.
23. Write the inequality for the graph below.
24. Write the inequality for the graph below.
25. Write the inequality for the graph below.
26. Fourteen less than the amount of money, m, is less than or equal to $35.
a. Model with an inequality.
b. Use the solution set to determine the solution to the inequality. {49, 50, 51, 52}
c. Graph the solution to the inequality.
27. Three times the weight, w, is greater than 336 pounds.
a. Model with an inequality.
b. Use the solution set to determine the solution to the inequality. {110, 111, 112, 113}
c. Graph the solution to the inequality.
28. Thirty-three more than a number, x, is 57.