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Glencoe/McGraw-Hill
NAME ______________________________________________ DATE
3-2
NAME ______________________________________________ DATE
____________ PERIOD _____
3-2
Skills Practice
Practice
(Average)
Solving Equations by Using Addition and Subtraction
Solving Equations by Using Addition and Subtraction
Solve each equation. Then check your solution.
Solve each equation. Then check your solution.
1. y 7 8 15
2. w 14 8 22
3. p 4 6 10
4. 13 5 x 18
5. 98 b 34 64
6. y 32 1 31
7. s (28) 0 28
8. y (10) 6 16
1. d 8 17 25
2. v 12 5 17
3. b 2 11 9
4. 16 s 71 87
5. 29 a 76 105
6. 14 y 2 12
7. 8 (c) 1 7
8. 78 r 15 93
9. f (3) 9 6
10. 4.2 n 7.3 3.1
11. w 1.9 2.5 4.4
12. 4.6 (b) 0.4 5
13. y (1.5) 0.5 1
14. a 0.13 0.58 0.45
15. k (4.21) 19
12. u (5) 15 10
13. 11 16 y 27
14. c (3) 100 97
15. 47 w (8) 39
16. x (74) 22 96
17. 4 (h) 68 64
18. 56 20 (e) 76
2 1
3 9
5
9
1
3
4
5
3
4
1
15
2
5
18. h 17. q 1
20
7
7
12 24
7
8
20. y 21. (n) Write an equation for each problem. Then solve the equation and check your
solution.
22. What number minus 9 is equal to 18?
n 9 18; 9
23. A number plus 15 equals 12. What is the number?
n 15 12; 27
24. The sum of a number and 3 is equal to 91. Find the number.
n (3) 91; 88
Write an equation for each problem. Then solve the equation and check your
solution.
19. A number decreased by 14 is 46. Find the number.
25. Negative seventeen equals 63 plus a number. What is the number?
17 63 n; 80
26. The sum of negative 14, a number, and 6 is 5. What is the number?
14 n 6 5; 3
n 14 46; 32
27. What number plus one half is equal to three eighths?
20. Thirteen subtracted from a number is 5. Find the number.
n 13 5; 8
1
3
1
n
; 2
8
8
HISTORY For Exercises 28 and 29, use the following information.
21. The sum of a number and 67 is equal to 34. Find the number.
n 67 34; 101
Galileo Galilei was born in 1564. Many years later, in 1642, Sir Isaac Newton was born.
28. Write an addition equation to represent the situation. 1564 22. What number minus 28 equals 2?
n 28 2; 26
23. A number plus 73 is equal to 27. What is the number?
Glencoe Algebra 1
24. A number plus 17 equals 1. Find the number.
25. What number less 5 is equal to 39?
y 1642
29. How many years after Galileo was born was Isaac Newton born? 78
n (73) 27; 100
HURRICANES For Exercises 30 and 31, use the following information.
The day after a hurricane, the barometric pressure in a coastal town has risen to
29.7 inches of mercury, which is 2.9 inches of mercury higher than the pressure when the
eye of the hurricane passed over.
n (17) 1; 16
30. Write an addition equation to represent the situation.
n 5 39; 34
b 2.9 29.7
31. What was the barometric pressure when the eye passed over? 26.8 in. of mercury
©
Glencoe/McGraw-Hill
145
Glencoe Algebra 1
©
Glencoe/McGraw-Hill
146
Glencoe Algebra 1
(Lesson 3-2)
A6
11. 14 d (10) 24
Lesson 3-2
10. j (17) 36 19
14.79
Answers
9
7
10 10
1
7
5
19. x 4
12
6
1
5
16. r 9. 1 s (19) 18
____________ PERIOD _____