Find the input for a given output

Set the function equal to the output and solve for x.

1. f(x) = 9x + 0. For what value of x is f(x) = −36?
2. f(x) = −6x − 4. For what value of x is f(x) = 14?
3. f(x) = −3x + 7. For what value of x is f(x) = 16?
4. f(x) = −9x + 11. For what value of x is f(x) = −34?
5. f(x) = 9x + 12. For what value of x is f(x) = 75?
6. f(x) = −10x − 2. For what value of x is f(x) = 78?
7. f(x) = −2x − 11. For what value of x is f(x) = 3?
8. f(x) = 9x + 3. For what value of x is f(x) = −15?
9. f(x) = 15x + 9. For what value of x is f(x) = −66?
10. f(x) = −15x + 1. For what value of x is f(x) = 106?
11. f(x) = 5x − 12. For what value of x is f(x) = 3?
12. f(x) = 9x + 11. For what value of x is f(x) = −43?
13. f(x) = 4x + 7. For what value of x is f(x) = −49?
14. f(x) = −8x + 2. For what value of x is f(x) = −102?
15. f(x) = −20x − 7. For what value of x is f(x) = −47?
16. f(x) = −20x − 1. For what value of x is f(x) = 179?
17. f(x) = 29x − 8. For what value of x is f(x) = −240?
18. f(x) = −22x + 6. For what value of x is f(x) = −16?
19. f(x) = −18x + 7. For what value of x is f(x) = −335?
20. f(x) = 2x + 3. For what value of x is f(x) = −35?