X*(1+0.2)*0.88-X=84改为算式

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X*(1+0.2)*0.88-X=84改为算式X*(1+0.2)*0.88-X=84改为算式X*(1+0.2)*0.88-X=84改为算式X*(1+0.2)*0.88-X=841.056X-X=840

X*(1+0.2)*0.88-X=84改为算式
X*(1+0.2)*0.88-X=84
改为算式

X*(1+0.2)*0.88-X=84改为算式
X*(1+0.2)*0.88-X=84
1.056X-X=84
0.056X=84
X=84÷0.056
X=1500

X*(1+0.2)*0.88-X=84
X*(1.2*0.88-1)=84
X*(120/100*88/100-1)=84
X*(6/5*22/25-1)=84
X*7/125=84
X=84*125/7=1500