Question

PLEASE PLEASE PLEASE HELP ME!!!

Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9?

x + 2y = 21

A. 4x + 6y = 64
B. 2x + y = 36
C. 4x + y = 21
D. -3x + 4y = 33
E. 3x + 2y = 28

Answer 1

It's C.

Explanation:

It's right on edmentum. Also, just use substitution. Not that hard.

Answer 2

C. 4x + y = 21

Explanation:

(4 x 3) + 9

12 + 9 = 21