(4/7X-12):X=2:(2+3)
即(4/7X-12):X=2:5
交叉相乘得
20/7X-60=2X,
6/7X=60,
X=70.
帮忙解一下这个方程(4/7X-12):X=2:(2+3),
帮忙解一下这个方程(4/7X-12):X=2:(2+3),
数学人气：803 ℃时间：2020-02-05 04:00:50
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