use elimination to solve the system of equations: 1) 3x-3y=-6 2)-5x+6y=12

Answer 1

Several ways to do this, as usual

notice that the first can be simplified
3x - 3y = -6
x - y = -2
x = y-2
now use substitution into the 2nd
-5x + 6y = 12
-5(y-2) + 6y = 12
-5y + 10 + 6y = 12
..
solve for y, then sub that into x = y-2 to get your x
works out easily

Answer 2

x-y=-2
-5x+6y=12