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方程5x+4x=3x+18怎么解?
人气:311 ℃ 时间:2019-12-09 09:35:59
解答
5x + 4x = 3x + 18
5x + 4x - 3x = 18
(5 + 4 - 3)x = 18
6x = 18
x = 18÷6
x = 3
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