8-2x=6用等式的基本性质怎么解答_百度知道The page is temporarily unavailable
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2/x-7=5+x 怎么 要具体过程,利用等式的基本性质
2/x-7=5+x2/x=5+x+7【等式两边同时加7】2/x=x+12【化简】2=x??+12x【等式两边同时乘以x】0=x??+12x-2【等式两边同时减2】0=（x??+12x+36）-38【利用（+36-38）仍=-2,化为“配方形式”】0=（x+6）??-38【化简】38= （x+6）??【等式两边同时加38】±√38=x+6【等式两边同时开方,√：为根号,±：为正负号】±√38-6=x【等式两边同时减6】固x1=√38-6,x2=-√38-6
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