Question

x + 2y = 10

3x + 4y = 8
Which point is the solution to the system of equations?
A) (7, 1.5)
B) (11,-12)
C) (-11, -12)
D) (-12, 11)

Answer 1

Let's multiply the first equation by -2 so that we can eliminate y.

-2x-4y=-20

3x+4y=8

X=-12

Since X is -12, let's plug it in to the equation to check.

-12+2y=10

2y=22; let's divide

y=11

So, D (-12,11)