x+2.70%x2-2.70%x2*20%=521.6 解方程

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x+2.70%x*2-2.70%x*2*20%=521.6解方程x+2.70%x*2-2.70%x*2*20%=521.6解方程x+2.70%x*2-2.70%x*2*20%=521.6解方程x+5.

x+2.70%x*2-2.70%x*2*20%=521.6 解方程
x+2.70%x*2-2.70%x*2*20%=521.6 解方程

x+2.70%x*2-2.70%x*2*20%=521.6 解方程
x+5.4%x-1.08%x=521.6
x+4.32%x=521.6
x+0.0432x=521.6
1.0432x=521.6
x=500

x+2.70%x*2-2.70%x*2*20%=521.6
x+2.70%x*2(1-20%)=521.6
x+2.70%x*2*80%=521.6
x+4.32%x=521.6
x(1+4.32%)=521.6
x*1.0432=521.6
x=521.6/1.0432
x=500

x+2.70%x(2-40%)=521.6
x+2.70%x160%=521.6
x+0.027x*1.6=521.6
1.0432x=521.6
x=500

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