Respuesta :

Answer:
x=-6
y=3

Explanation:
y=-4x-21
8x+8y=-24

y=-4x-21
8x+8(-4x-21)=-24

y=-4x-21
-24x-168=-24

y=-4x-21
x=-6

y=-4(-6)-21
x=-6

y=3
x=-6

(-6,3) this is in point form in case you need it