Question

plz help
what expression should be substituted for y in the equation 5x+2y=25 to solve the system of equations?

4x+y=-12

5x+2y=25


A) -4x-12

B)$-\frac{y}{4} -3$

C)$-\frac{5}{2}x+\frac{25}{2}$

D)$-\frac{2}{5}y+5$

Answer 1

answer: A

solve the first equation for y
4x + y = -12
subtract both sides by 4x
y = -4x - 12