Lesson Review

Directions: Simplify these problems by combining like terms.

1. 9s + 2s - 3s - 6

2. 12t - 4t - 6 + 5t

3. 18r + 13r + 4r - 3r =

4. 21 - 4q + 42r - 16 =

5. 19st - 6s + t =

6. 107 + 107x - x =

7. 15a2 - 12a + a2 - 3a

8. 13t + 14t + t =

9. r + s + rs +2s + rs + s=

10. 5pt - 3p + 4t - 2pt =

11. 13x2 + 3x2 - x =

12. 103c - 5c + 9c =

13. 11q - 4 + 10q - 5q + 9 =

14. 2k - 28k + 3k =

15. 183x + 91x - 23x =