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数学
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4x -3(x-1.5)=9
人气:467 ℃ 时间:2020-02-03 08:54:55
解答
4x -3(x-1.5)=9
去括号得 4x-3x+4.5=9
移项得:【4-3】x=9-4.5
系数化为1得:x=4.5
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