Question

Solve the system of equations by graphing
x+y=-7
2x + y = 6

Answer 1

The red line is x+y=-7

The blue line is 2x + y = 6

(13, -20) is the solution

Answer 2

x=13, y=-20

Explanation:

x+y=-7

2x+y=6

Subtract x from both sides of the first equation to be left with y=-x-7. Substituting this into the second equation, you get:

2x-x-7=6

x-y=6

x=13

y=-20

I also solved this graphically, which you can see below. Hope this helps!