Solve the system using substitution.

-5x+y=4

4x-4y=16

a - (-4,0)

b - (1,4)

c - (0,-4)

d - (4,1)

Substitution method is one of the ways to solve this system.

-5x+y=4 and 4x-4y=16.

First we will divide the second equation with number 4 and get

x-y=4 = > x=y+4 than we will replace x in the first equation

-5 (y+4) + y=4 = > - 5y-20+y=4 = > - 4y=4+20 = > - 4y=24 = > y=-6

x - (-6)) = 4 = > x+6=4 = > x=4-6=-2 (x, y) = (-2,-6)

Good luck!