Question

solve this system with elimination
-x+5y=13
x-y=15

Answer 1

If you add the two equations the x terms will drop out since they are opposites.

Answer 2

If u add them both up, u'll get

4y=28
So what is y?

Answer 3

-x+5y=13
+
x-y=15

add them together, and the x's cancel.

4y=28. Divide by 4 on both sides,
y=7. Plug 7 into one of the equations.

x-(7)=15
+7 +7

x=22

The solution set is (22,7)