Combine like terms in longer expressions

Add the x terms together and the plain numbers together. Write the answer as ax + b.

1. Simplify: 6x + 5 + 6x + 4 + 6x. Write your answer as ax + b.
2. Simplify: 6 − 1 − 6x + x + 2x. Write your answer as ax + b.
3. Simplify: −4 + 4x + 5 − 2x − 6x. Write your answer as ax + b.
4. Simplify: 2x + 3 − 1 + 4x − 3x. Write your answer as ax + b.
5. Simplify: 4x − 5x + 6 + 6 + 3x + 3. Write your answer as ax + b.
6. Simplify: −4 + 2 + 2x + 6 + 2x − 9x. Write your answer as ax + b.
7. Simplify: −9 − 2 + 1 − 2x + 5x + 3x. Write your answer as ax + b.
8. Simplify: −3 − x + 1 − 4x − 4 − x. Write your answer as ax + b.
9. Simplify: 12x − 6x + 12 + 4 + 10x + 12 + 5x. Write your answer as ax + b.
10. Simplify: −3 + x + 9 + 10 + 12x − 4x + 4x. Write your answer as ax + b.
11. Simplify: 10x − 12x − 2x + 5 − 4x − 10 − 9. Write your answer as ax + b.
12. Simplify: −6 − 6 + 7 − 7x + 9x − 2x − 3x. Write your answer as ax + b.
13. Simplify: 15x − 9 + 1 + 13 + x − 3 + 11x + 6x. Write your answer as ax + b.
14. Simplify: 4x + 2x − 11x + 5 + 6 − 2 + 8x + 14. Write your answer as ax + b.
15. Simplify: −10x − 5 + 14x + 5 − 3 − 7 − 12x − 10x. Write your answer as ax + b.
16. Simplify: −9x − 10 + 3x + 14 − 10 + 9 − x + 10x. Write your answer as ax + b.
17. Simplify: −8x − 17 − 18x + 7 + 20x + 11x − 20 + 5 + 18x. Write your answer as ax + b.
18. Simplify: 13 − 20x + 5x + 16x + 4x + 4x − 6 + 11 + 9. Write your answer as ax + b.
19. Simplify: 1 − 13 + 7x − 5x + 18 − 2x − 15x − 11x + 19. Write your answer as ax + b.
20. Simplify: −5x + 7 − 5x − 3 + 16 − 19 − x − 6x + 8x. Write your answer as ax + b.