已知A=2B C=5A (A大于或小于0) 求6A+2B-C/A-4B+C=?要详细点.我就是因为那些写的不明白才发上来问的- -6a+2b-c÷a-4b+c解:=6a+a-5a÷a-2a+5a=2a÷4a=1/2我怎么算来算去都是﹣5?2A是怎么算的,4A是怎么算
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![已知A=2B C=5A (A大于或小于0) 求6A+2B-C/A-4B+C=?要详细点.我就是因为那些写的不明白才发上来问的- -6a+2b-c÷a-4b+c解:=6a+a-5a÷a-2a+5a=2a÷4a=1/2我怎么算来算去都是﹣5?2A是怎么算的,4A是怎么算](/uploads/image/z/664267-67-7.jpg?t=%E5%B7%B2%E7%9F%A5A%3D2B+C%3D5A+%EF%BC%88A%E5%A4%A7%E4%BA%8E%E6%88%96%E5%B0%8F%E4%BA%8E0%EF%BC%89+%E6%B1%826A%2B2B-C%2FA-4B%2BC%3D%3F%E8%A6%81%E8%AF%A6%E7%BB%86%E7%82%B9.%E6%88%91%E5%B0%B1%E6%98%AF%E5%9B%A0%E4%B8%BA%E9%82%A3%E4%BA%9B%E5%86%99%E7%9A%84%E4%B8%8D%E6%98%8E%E7%99%BD%E6%89%8D%E5%8F%91%E4%B8%8A%E6%9D%A5%E9%97%AE%E7%9A%84%EF%BC%8D+%EF%BC%8D6a%2B2b-c%C3%B7a%EF%BC%8D4b%EF%BC%8Bc%E8%A7%A3%EF%BC%9A%3D6a%2Ba-5a%C3%B7a-2a%2B5a%3D2a%C3%B74a%3D1%2F2%E6%88%91%E6%80%8E%E4%B9%88%E7%AE%97%E6%9D%A5%E7%AE%97%E5%8E%BB%E9%83%BD%E6%98%AF%EF%B9%A35%3F2A%E6%98%AF%E6%80%8E%E4%B9%88%E7%AE%97%E7%9A%84%2C4A%E6%98%AF%E6%80%8E%E4%B9%88%E7%AE%97)
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