Question

system of equation

Answer 1

8x = 23 + 7y
8x - 7y = 23
-4(2x + 4y) = 0 (-4)

8x - 7y = 23
-8x -16y = 0

-23y = 23
y = 1
Solve for x L
8x = 23 + 7 (1)
8x = 23 + 7
8x = 30
x = 30/8
x= 15/4

Answer 2

I cranked out (2, -1) as the common solution here. I must have messed up. Let me check.

Answer 3

8x = 23 + 7y
2x + 4y = 0
==========

Is (2, -1) a common solution?

8(2) = 23 + 7(-1) ??---> 23 -7 = 16 yes

2(2) + 4(-1) = 0 ?? ---> 4 - 4 = 0 yes

I'm going with x = 2 --> Option B