60/(x-10)+(300-60)/x=8,

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60/(x-10)+(300-60)/x=8,
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60/(x-10)+(300-60)/x=8,
60/(x-10)+(300-60)/x=8,

60/(x-10)+(300-60)/x=8,
60/(x-10)+(300-60)/x=8式子2边同时*(x-10>*x则变形可得 60x+(300-60)*(x-10)=8*(x-10>*x 在化解以后的步骤自己写吧.