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数学
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2 3
—— + —— = 0
x-3 4+x
人气:128 ℃ 时间:2020-07-03 15:09:13
解答
两边乘(x-3)(4+x)
8+2x+3x-9=0
5x=1
x=1/5
经检验,x=1/5是方程的解
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