Solving systems of equations by eliminating
1. 3x-2y=2, 5x-5y=10
2. 5x+4y=-30 , 3x-9y=-18
3. 8x+14y=4 , -6x-7y=-10
4. -4x15y=-17 , -x+5y=-13
5. -7x-8y=9 , -4x+9y=-22
6. -4x-2y=14 , -10x+7y=-25
7. 5x+4y=-14 , 3x+6y=6
8. -7x-20y=-14 , -2x+10y=4
9. -2x-y=-3 , -10x-7=3