1/(x-35):1/(x-68)=5:4
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1/(x-35):1/(x-68)=5:4
1/(x-35):1/(x-68)=5:4
1/(x-35):1/(x-68)=5:4
1/(x-35):1/(x-68)=5:4得到
5/(x-68)=4/(x-35),进一步得到
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