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8.2÷1.2x=7
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8.2÷1.2x=78.2÷1.2x×1.2x=7×1.2x8=8.4x8.4x=8x=8÷8.4x=20/21
咨询记录 · 回答于2022-11-28
8.2÷1.2x=7
8.2÷1.2x=78.2÷1.2x×1.2x=7×1.2x8=8.4x8.4x=8x=8÷8.4x=20/21
亲亲 20/21读作21分之20
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_220.png)
亲亲 ,,/ 左边是分子 右边是分母
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
亲亲 所以 8.2÷1.2x=7 解得x=20/21
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_246.png)
8.2÷1.2x=78.2÷1.2x×1.2x=7×1.2x8=8.4x8.4x=8x=8÷8.4x=20/21