方程(5x-15)/(4x+23)=15/23怎么解?
人气：210 ℃ 时间：2020-04-11 17:18:10
解答
两边同乘以(4x+23),把分母去掉
5x-15=15/23(4x+23)
5x-15=60/23 x+ 15
5x-60/23 x=15+15
x=690/55
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