In solving the following system of equations, what would you multiply by in order to eliminate the y?

Equation 1: x + y = 7 Equation 2: 5x + 2y = 8

A. 0
B. -5
C. -2
D. 2
E. 5

Give the solution to the system above

A. (7, 0)
B. (1, 6)
C. ( 8, - 1)
D. ( 3, 4)
E. ( -2, 9)

Respuesta :

Answer:

D

E

Step-by-step explanation:

we need to multiply x+y=7 by   2

2x+2y=14

5x+2y=8

subtract

-3x=6

x=6/(-3)=-2

-2+y=7

y=7+2=9

solution is (-2,9)