0.2分之0.1x=0.7分之0.2x-0.11/2x=2/7x-1/71/2x-2/7x=-1/73/14x=-1/7x=-1/7÷3/14x=-2/35分之x-2-10分之x+3=3分之2x-5-3 两边乘306（x-2）-3(x+3)=10(2x-5)-906x-12-3x-9=20x-50-903x-21=20x-14020x-3x=140-2117x=11...