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(5/4x-10)/(x-8)=5/7
人气:247 ℃ 时间:2020-05-03 07:55:27
解答
(5/4x-10)/(x-8)=5/7
7(5/4x-10)=5(x-8)
35/4x-70=5x-40
35/4x-5x=70-40
15/4x=30
x=30x4/15
x=8
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