解方程:80/x - 80/1.5x=20
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解方程:80/x - 80/1.5x=20
![解方程:80/x - 80/1.5x=20](/uploads/image/z/2318196-12-6.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%3A80%2Fx+-+80%2F1.5x%3D20)
80/x - 80/1.5x=20
①:80/x - 80/(3/2)x=20
②:80/x - 160/3x=20
③:240/3x-160/3x=20
④:80/3x=20
⑤:x=4/3
①:80/x - 80/(3/2)x=20
②:80/x - 160/3x=20
③:240/3x-160/3x=20
④:80/3x=20
⑤:x=4/3