12x-6y=2
10y=30x-7
12+15y=23x
17x- 0.8y=1
4x-y=12
-3y+14=16x
4y=10x-10
0.75x+6y=6
-2x-4y=-1
-4x-2y=15
-12y=-4x+6
6y-66x=22
31x=-6y-3
-y=-8-4x
0.5x-0.25y=-1
-8x+y=10
-x-y=5
5y=7
17x=10y

First of all, are you trying to find slope intercept form for all these equations or you trying to find the general form for slope intercept form, which is y=mx + b.