Question 301316
first you have to rearrange the second.
4x+8=y
now plug 4x+8 for y in the first
5x-2*(4x+8)=-7
5x-8x-16=-7
-3x=9
x=-3
now plug that into the second and solve for y
8=y-4*(-3)
8=y+12
-4=y
(x,y)=(-3,-4)