Question

What is the x-coordinate of the solution of the following system of equations?



3x + y = 6

x - y = 6

-3
0
3

Answer 1

First, you want to isolate the y so you can set the equations as equal (as y = y) to each other with x as the only variable. Then you can solve for x by isolating x.

The first step serves to get rid of the y variable since you won't need that.