Question

Solve the given system of equations. 2y=-x+9 and 3x-6y=-15

Answer 1

y=1 and x=7 because if you make the first equation into a x= equation, you can just substitute it for the second equation and solve it. 

Answer 2

2y+x=9
-6y+3x=-15

6y+3x=17
-6y+3x=-15

6x=2

x=1/3