Question

Solve the system of equations using the linear combination method.

4- 3y=12
178-3y=3
Enter your answers in the boxes.
X
Y

Answer 1

Answer: x = -3; y = -8

Explanation:

Multiply second equation by -1 and add to first equation. The y term zeros out, leaving you with -3x = 9, so x = -3.

Then go back and sub -3 in for x in either equation, and solve for y. If you use the first equation, you get 4(-3) -3y = 12

-12 -3y = 12

-3y = 24

y = -8