0.5x+2/0.03-x=0.3(0.5x+2)/0.2

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0.5x+2/0.03-x=0.3(0.5x+2)/0.2

0.5x+2/0.03-x=0.3(0.5x+2)/0.2
0.5x+2/0.03-x=0.3(0.5x+2)/0.2

0.5x+2/0.03-x=0.3(0.5x+2)/0.2

0.5x+2/0.03-x=0.3(0.5x+2)/0.2
-0.5x+2/0.03=0.3(0.5x+2)/0.2
-0.5x+200/3=3(0.5x+2)/2
两边同时乘以2得
-x+400/3=3(0.5+x)
-x+400/3=1.5+3x
-x-3x=3/2-400/3
-4x=9/6-800/6
-4x=-791/6
x=791/24


0.5x+2/0.03-x=0.3(0.5x+2)/0.2
两边同时乘以6得
3x+400-6x=9(0.5x+2)
3x+400-6x=4.5x+18
3x-6x-4.5x=18-400
-7.5x=-382
x=764/15

算x吗?
0.5x+2/0.03-x=0.3(0.5x+2)/0.2
-0.5x+2/0.03=1.5(0.5x+2)
2/0.03-3=0.25x
x=254.6666666666667