1. x - 5y = -5 4x + 20y = 20

x = 0 , y = 1

Step-by-step explanation:

x - 5y = -5

  +5y    +5y

x = -5 + 5y

4x + 20y = 20

4(-5 + 5y) + 20y = 20

-20 + 20y + 20y = 20

-20 + 40y = 20

+20             +20

40y = 40

/40    /40

y = 1

x = -5 + 5y

x = -5 + 5(1)

x = -5 + 5

x = 0

So, using the method of substitution, we get x = 0 and y = 1.

I agree with manamoto13 , the answer is  y= 1  and x=0

c) yes, because of asa or aas