解方程
x-5%x=38
x(1-5%)=38
xX0.95=38
x=40
32%X+40X=21.6
x(32%+40)=21.6
xX40.32=21.6
x=21.6/40.32
x=15/28
50-125%X=37.5
-125%x=37.5-50
-1.25x=-12.5
x=10
32%X+4X=21.6
x(0.32+4)=21.6
4.32x=21.6
x=5对吗100%正确！！