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3-1.2x-5分之4x-12等于?
人气:284 ℃ 时间:2020-04-26 08:25:45
解答
3-1.2x-4x/5-12
=3-6x/5-4x/5-12
=3-10x/5-12
=3-2x-12
=-9-2x
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