解方程50(x+1)*80%=50x*90%

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解方程50(x+1)*80%=50x*90%解方程50(x+1)*80%=50x*90%解方程50(x+1)*80%=50x*90%50(x+1)*80%=50x*90%40(x+1)=45x去括号得

解方程50(x+1)*80%=50x*90%
解方程50(x+1)*80%=50x*90%

解方程50(x+1)*80%=50x*90%
50(x+1)*80%=50x*90%
40(x+1)=45x
去括号得40x+40=45x
移项,合并得40=5x
解得x=8
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50(x+1)*80%=50x*90%
40(x+1)=45x
40x+40=45x
45x-40x=40
5x=40
x=40÷5
x=8

50(x+1)*80%=50x*90%
两边同时除以5,得
8(x+1)=9x
8x+8=9x
9x-8x=8
x=8