Solve systems by elimination

Add the equations so one letter disappears.

1. Solve the system: −3x − 5y = −5 and −3x + 5y = −25
2. Solve the system: −3x − 3y = 21 and −2x + 3y = −1
3. Solve the system: −x − 3y = −16 and −2x + 3y = 13
4. Solve the system: −3x − y = −1 and 4x + y = 0
5. Solve the system: −3x + y = −16 and 4x − y = 21
6. Solve the system: −x + 5y = 18 and −2x − 5y = −24
7. Solve the system: x + 5y = 9 and −2x − 5y = −8
8. Solve the system: 2x − 4y = 8 and −3x + 4y = −2
9. Solve the system: 4x − 5y = −47 and 4x + 5y = 23
10. Solve the system: 4x − 2y = 24 and −3x + 2y = −17
11. Solve the system: −2x + 4y = 22 and −x − 4y = −43
12. Solve the system: −x − 3y = −29 and 4x + 3y = 44
13. Solve the system: −4x + 4y = 4 and −x − 4y = −19
14. Solve the system: 3x − y = 21 and −2x + y = −18
15. Solve the system: −3x − 2y = 36 and 4x + 2y = −46
16. Solve the system: −3x + 4y = −15 and −4x − 4y = −48
17. Solve the system: 2x − 4y = −24 and 4x + 4y = 84
18. Solve the system: 3x − 3y = 12 and −x + 3y = 16
19. Solve the system: x + 2y = 1 and −2x − 2y = −10
20. Solve the system: −3x − 3y = 60 and −x + 3y = −20