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合并下列各式的同类项
1.-(5x-y-2z)-3[4x-(x-y-z)+2y]
人气:458 ℃ 时间:2020-06-02 12:18:07
解答
.-(5x-y-2z)-3[4x-(x-y-z)+2y]
=-5x+y+2z-12x+3(x-y-z)-6y
=-5x+y+2z-12x+3x-3y-3z-6y
=-14x-8y-z
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