(4X+4)/3=X+4 解得X=8,我怎么解得16/7?
人气:103 ℃ 时间:2020-05-01 08:52:34
解答
(4X+4)/3=X+4
两边乘以 3
4X+4=3X+12
4X-3X=12+4
X=8
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