(0.7-0.1x)÷0.4-(x-1)/3 = 1-x
[(7-x)/4]-(x-1)/3 = 1-x
两边同乘以12
3(7-x)-4(x-1)=12-12x
合并同类项 得:-7x+25=12-12x
5x=-13
x=-13/5