Solving Equations with the Variable on Each Side
NAME
DATE
PERIOD
2-4 Skills Practice
Solving Equations with the Variable on Each Side
Justify each step.
1.
4k - 3 = 2k + 5
4k - 3 - 2k = 2k + 5 - 2k
2k - 3 = 5
2k - 3 + 3 = 5 + 3
2k = 8
2k 2
=
8 2
k = 4
a. Subtract 2k from each side. b. Simplify. c. Add 3 to each side. d. Simplify. e. Divide each side by 2. f. Simplify.
2. 2(8u + 2) = 3(2u - 7) 16u + 4 = 6u - 21
16u + 4 - 6u = 6u - 21 - 6u
10u + 4 = -21
10u + 4 - 4 = -21 - 4
10u = -25
10u 10
=
-25 10
u = -2.5
a. Distributive Property b. Subtract 6u from each side. c. Simplify. d. Subtract 4 from each side. e. Simplify. f. Divide each side by 10.
g. Simplify.
Solve each equation. Check your solution.
3. 2m + 12 = 3m - 31 43
5. 7a - 3 = 3 - 2a
2 3
7. 4x - 9 = 7x + 12 -7
4. 2h - 8 = h + 17 25 6. 4n - 12 = 12 - 4n 3 8. -6y - 3 = 3 - 6y no solution
9. 5 + 3r = 5r - 19 12
10. -9 + 8k = 7 + 4k 4
11. 8q + 12 = 4(3 + 2q) all numbers
13. 6(-3v + 1) = 5(-2v - 2) 2
15. 3(8 - 3t) = 5(2 + t) 1
17. 8(2f - 2) = 7(3f + 2) -6
19. 6(w - 1) = 3(3w + 5) -7
21.
2 3
v
-
6
=
6
-
2 3
v
9
12. 3(5j + 2) = 2(3j - 6) -2
14. -7(2b - 4) = 5(-2b + 6)
-0.5
or
-
1 2
16. 2(3u + 7) = -4(3 - 2u) 13
18. 5(-6 - 3d) = 3(8 + 7d)
20. 7(-3y + 2) = 8(3y - 2)
22.
1 2
-
5 8
x
=
7 8
x
+
7 2
-2
-1.5
or
-1
1 2
2
3
Copyright ? Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Lesson 2-4
Chapter 2
25
Glencoe Algebra 1
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