1/3=5/12x-x/4
1/6x=1/3
x=2
2/3-8x=3-1/2x
7.5x=-7/3
x=-14/45
0.5x-0.7=6.5-1.3x
1.8x=7.2
x=4
1/6（3x-6）=2/5x-3
1/2x-1=2/5x-3
1/10x=-2
x=-20