In order to solve for this system, we'll have to use the subtraction method.
x + 5y = -15
-2x - 10y = 30
___________
Multiply the first equation by 2:
2x + 10y = -30
-2x - 10y = 30
___________
(Add these equations together)
0 = 0
This system has an infinite number of solutions.
