Question

What is the solution of this system of equations
Y=3x+7 y=x-9

Answer 1

x=-8, y=-17. (-8, -17).

Explanation:

y=3x+7

y=x-9

-----------

3x+7=x-9

3x-x+7=-9

2x+7=-9

2x=-9-7

2x=-16

x=-16/2

x=-8

y=-8-9=-17