Question

Is this correct...y-coordinate?

Answer 1

4x-(x+6)=-21
x=-9

Answer 2

y=-9+6

Answer 3

wait i made mistake

Answer 4

4x-x-6=-21
so
x=-3

Answer 5

So y=-3+6= 3

Answer 6

You cant plug the x into the other equation because that's where you plugged in the y.

Answer 7

So y = 3?

Answer 8

Yes.

Answer 9

IF you have a graphing calculator you can set both equations to y = ? and graph them both, the interception will be the solution set.

Answer 10

Thank you very much @RyleeC