Question

3x-8y=-18 2x+5y=19

Answer 1

Okay solve for one variable and then plug that equation into the 2nd one to eliminate a variable.

Answer 2

I think you're talking about solving a system here, possibly by elimination? Try multiplying the first equation by 5, and the second equation by 8... that will give you

15x - 40y = -90
16x + 40y = 152

Now, if you add the equations together, you'll have

31x = 62

From here, you can solve for x, and then use that to solve for y... does that sound okay to you?