2a - 3b = -13
-b = -2a - 7

Help?

from your second equation, b = 2a + 7,

put this into your first equation, and you will have an equation in terms of a
Once you have a value for a, you can work out b.

If you need further help, just ask!

Well yes gal, but the topic was "sub method problem" :p

5x-3y=-4
x+y=-4

Solve the system: x+6y=-2
5x-20y=5

Hi guys, we recommend you open a new post if you have a new question.

You can use the same method that I outlined above though.