1 6x=5
x=5/6
2 6y=-12
y=-2
3 3x-6+1=x-2x+2
3x-x+2x=2+6-1
4x=7
x=7/4
4 3/2x+3/2-3x+1/6=1
-3/2x=1-1/6-3/2
-3/2x=-2/3
x=4/9