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7x/(5x+12)=9/7怎么算
人气：415 ℃ 时间：2020-04-07 21:48:32
解答
7x/(5x+12)=9/7怎
交叉相乘
49x＝9(5x+12)
49x=45x+108
4x=108
x=27
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7X:(5X+12)=9：7怎么解 急
解方程：7x/(5x+12)=9/7
4/5x-6/7x=12!
5X-20-49+7x-9=12-27十X
5X-20-(49-7X)-9=12-(27-3X)
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