0.2x+(1-0.25)*0.2x+12=0.5x怎么解

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0.2x+(1-0.25)*0.2x+12=0.5x怎么解0.2x+(1-0.25)*0.2x+12=0.5x怎么解0.2x+(1-0.25)*0.2x+12=0.5x怎么解0.2x+(1-0.25)

0.2x+(1-0.25)*0.2x+12=0.5x怎么解
0.2x+(1-0.25)*0.2x+12=0.5x怎么解

0.2x+(1-0.25)*0.2x+12=0.5x怎么解
0.2x+(1-0.25)*0.2x+12=0.5x
0.2x-0.15x+12=0.5x
0.5x-0.2x+0.15x=12
0.45x=12
x=80/3

0.2x+(1-0.25)*0.2x+12=0.5x
0.2x+0.15x+12=0.5x
0.5x-0.2x-0.15x=12
0.15x=12
x=12/0.15
x=80

移项x-0.2x-0.5x=18+0.1-3 0.3x=15.1 x=15.1÷0.3 x=50又3分之1 0.2x+18+0.1+0.5x-3=x 0.7x+15.1=x x-0.7x=15.1