Question

How do you solve the system by graphing `x-3y=-3` and `x+3y=9`?

Answer 1

If you rearrange both equations into `y=mx+b` format, you can then find the intersection point of the two lines to get the solution for x & y (3 & 2 respectively).

Explanation:

First, rearrange the equations:
`y=x/3+1`
`y=-x/3+3`

plotting these two equations gives you the following graph:
graph{(y-(-x/3+3))(y-(x/3+1))=0 [-1, 8, -1, 4]}

the intersection of which is your solution (3,2), or x=3, y=2