Question

Y=3×+7 y=×-9 what is the solution of the equation

Answer 1

The answer is -8 because you set the equations equal to each other and solve for x

Answer 2

Since both equations are equal to y you can just make them equal to each other, like this 3x + 7 = x - 9. From there isolate the varible x on one side so that the solution will be on the other side of the equation. I'll do the steps too for you.

3x + 7 = x - 9

2x + 7 = -9

2x = -16

x = -8

Hope this helps :)