Question

Which ordered pair is the solution to the system of equations?
-3x+4y=-20
x+4y=-4
A.
(8, 1)

B.
(−12, 2)

C.
(−4, −8)

D.
(4, −2)

Answer 1

x+4y=-4
x=-4-4y


-3(-4-4y)+4y=-20
12+12y+4y=-20
16y=-20-12
y=-32/16
y=-2


x=-4-4(-2)
x=-4+8
x=4



D.(4,2)