DMV Throwers · Yo-Yos in the Classroom

Pre-Algebra: Solve for x

Grade 7 — Solve each equation. x stands for a number of tricks, strings, or yo-yos. Check your answer by substituting it back in.

Name: ______________________________Date: ____________

1. 3x + 5 = 20

Show your work (and check):

2. 2x − 7 = 9

Show your work (and check):

3. x/4 + 3 = 8

Show your work (and check):

4. 5x − 12 = 23

Show your work (and check):

5. −2x + 9 = 3

Show your work (and check):

6. x/3 − 4 = 2

Show your work (and check):

7. 4(x − 2) = 24

Show your work (and check):

8. 7x + 2 = 3x + 18

Show your work (and check):
✂ Teacher Answer Key (cut or fold under before copying)
1. x = 5 (3×5+5 = 15+5 = 20 ✓)2. x = 8 (2×8−7 = 16−7 = 9 ✓)
3. x = 20 (20÷4+3 = 5+3 = 8 ✓)4. x = 7 (5×7−12 = 35−12 = 23 ✓)
5. x = 3 (−2×3+9 = −6+9 = 3 ✓)6. x = 18 (18÷3−4 = 6−4 = 2 ✓)
7. x = 8 (4×(8−2) = 4×6 = 24 ✓)8. x = 4 (28+2 = 30; 12+18 = 30 ✓)
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