Question

solve the system of equations by graphing. then classify the system x+y=15 x-y=-3

Answer 1

If you add them together:

x+y=15
+ x-y=3
____________
2x+0=18

2x=18

x = 9

Answer 2

so would the coordinates be (2,18) and (9,0) ?

Answer 3

I missed a (-) sign in my addition. It should be 2x+0 = 12.

Answer 4

Therefore x=6 and y=3

Answer 5

how do I find the solution for this system of equations?