(0.2x-0.1)/3-(0.01x+0.02)/0.05=0.1x0.2x-0.1 0.01x+0.02---------- - -------------- = 0.1x0.3 0.05

(0.2x-0.1)/3-(0.01x+0.02)/0.05=0.1x0.2x-0.1 0.01x+0.02---------- - -------------- = 0.1x0.3 0.05
(0.2x-0.1)/3-(0.01x+0.02)/0.05=0.1x
0.2x-0.1 0.01x+0.02
---------- - -------------- = 0.1x
0.3 0.05

(0.2x-0.1)/3-(0.01x+0.02)/0.05=0.1x0.2x-0.1 0.01x+0.02---------- - -------------- = 0.1x0.3 0.05
(0.2x-0.1)/0.3-(0.01x+0.02)/0.05=0.1x
两边先除 0.1
(2x-1)/0.3-(0.1x+0.2)/0.05=x
再对(0.1x+0.2)/0.05 上下乘20,即 (2x+4)
那么 (2x-1)/0.3-(2x+4)=x
两边乘0.3
(2x-1)-0.3(2x+4)=0.3x
2x-1-0.6x-1.2=0.3x
(2-0.6-0.3)x=1+1.2
1.1x=2.2
x=2.2/1.1=2