2- x+5/6=x- x-1/3
两边乘6
12-x-5=6x-2x+2
7-x=4x+2
5x=5
x=1
0.1-0.2x/0.03-1=0.7-x/0.4
两边乘1.2
40-80x-1.2=5.1-3x
77x=33.7
x=337/770