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五年级方程怎么检验
更新时间: 2021-05-29 01:46:11  

1、把解出的未知数的解,分别代入原方程的左边和右边,如果左边等于右边,那么,未知数的解,就是原方程的解。

2、如:2x+5=7,2x=7-5,x=1。

3、检验:左边=2×1+5=7,右边=7,左边=右边,所以:x=1是元方程的解。

关键词: 年级 方程 怎么 检验

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