Use the elimination method to solve the system:
2x + y=-3
3x - y = -17
//ohmygod help me guys .-.
to solve the system add the like terms. 2x + 3x = 5x, and y+-y = nothing so y cancels out. And -3+-17 = -20. This leaves you with 5x = -20. From here you devide 5 from -20. Which leave you with x=4. So now you will fill in 4 for x in both equations to find y.