WILL GIVE BRAINLIEST!!!! pls help
-solve the following equations using substitution and show all steps/work.

1. -5x+y=-22
-6x+5y=-15

2. -6x+7y=6
7x+y=-7

3. -6x+4y=-16
8x+5y=-20

4. y=-6x+3
18x+3y=-3

5. y=-5x-21
y=8x+18