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

-5x+y=-22

Add -y to both sides.

-5x+y+(-y)=-22+(-y)

-5x=-y-22

Divide both sides by -5

-5x/-5=-y-22/-5

x=1/5y+22/5

which is your answer^

Step-by-step explanation:

-6x+5y=-15

Add -5y to both sides.

-6x+5y+(-5y)=-15+(-5y)

-6x=-5y-15

Divide both sides by -6

-6x/-6=-5y-15/-6

x=5/6y+5/2

which is the answer to the first set of questions.

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: