What is the solution of the system?

4x-y=-3

6x-y=-8

6x - y = - 8

y = 6x + 8 - not plug this in the first equation

4x - y = - 3

4x - (6x + 8) = - 3

4x - 6x - 8 = - 3

-2x = - 3+8

-2x = 5

x = 5 / (-2)

x = - 5/2

Now we can solve for y.

As we said before, y = 6x + 8

y = 6 * (-5/2) + 8

y = - 15 + 8

y = - 7

{x, y} = {-5/2,-7} is the solution to the system