Question

3x+13y=-111 6x+15y=-123 solve the following system of equations using any method

Answer 1

Multiply the first equation by two to get:

6x + 26y = -222

Subtract the equations from one another:

6x + 26y = -222
Subtract 6x + 15y = -123

This gives you:

11y = -99
So y = -9

Sub y = -9 into

3x + 13(-9) = -111
3x - 117 = -111
3x = 6
X = 2