Question

Solve 2x + 3y = 4 - 2x - y = -8

Answer 1

y = -2 and x = 5

Explanation:

2x + 3y = 4

-2x - y = -8

Since this is a system of equations, we can either substitute or subtract. I will be subtracting.

2x + 3y - 2x - y = 4 - 8

2y = -4

y = -2

Now that we have y, we will plug it in for the first equation and solve.

2x + 3(-2) = 4

2x - 6 = 4

+ 6 + 6

2x = 10

x = 5