Find x in a system by setting the expressions equal

Set the two expressions for y equal to each other and solve for x. Use x to find y.

1. Solve the system: y = 4x + 27 and y = −4x − 21. What is the value of x?
2. Solve the system: y = −3x − 12 and y = x. What is the value of x?
3. Solve the system: y = −3x + 6 and y = 4x − 8. What is the value of x?
4. Solve the system: y = −5x − 21 and y = −4x − 16. What is the value of x?
5. Solve the system: y = 3x + 17 and y = −3x − 19. What is the value of x?
6. Solve the system: y = 4x − 7 and y = −x − 7. What is the value of x?
7. Solve the system: y = 3x + 17 and y = −x − 15. What is the value of x?
8. Solve the system: y = −5x − 29 and y = −3x − 17. What is the value of x?
9. Solve the system: y = 4x − 11 and y = −3x + 17. What is the value of x?
10. Solve the system: y = 6x − 47 and y = −6x + 61. What is the value of x?
11. Solve the system: y = −4x + 3 and y = −3x + 4. What is the value of x?
12. Solve the system: y = −5x + 14 and y = −7x + 18. What is the value of x?
13. Solve the system: y = −6x − 12 and y = 4x − 12. What is the value of x?
14. Solve the system: y = 3x + 30 and y = −7x − 30. What is the value of x?
15. Solve the system: y = −5x − 8 and y = 5x + 22. What is the value of x?
16. Solve the system: y = 4x + 2 and y = −6x − 8. What is the value of x?
17. Solve the system: y = 5x − 13 and y = 7x − 15. What is the value of x?
18. Solve the system: y = 9x − 15 and y = −2x + 7. What is the value of x?
19. Solve the system: y = −9x + 60 and y = −6x + 39. What is the value of x?
20. Solve the system: y = −7x + 12 and y = −2x − 3. What is the value of x?