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x-9/4x+140=4/3x 请问这个方程怎么解?
人气:255 ℃ 时间:2020-03-25 09:41:25
解答
140=4/3x+9/4x-x
140=16/12x+27/12x-x
140=43/12x-x
140=43/12x-12/12x
140=21/12x
140*12/21=12/21*21/12x
x=80
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