First equation: -8x+7y=-17
Second equation: y=2x+1
Take the value of y from the second equation, as y is already isolated, and plug it in for y in the first equation. Simplify and solve for x.
-8x+7(2x+1)=-17
-8x+14x+7=-17
6x+7=-17
6x=-24
x=-4
Take the value of x we just found and plug it into the first equation. Solve for y.
-8(-4)+7y=-17
32+7y=-17
7y=-49
y=-7
Hope this helps!! :)
