(4x-2y-z)-(5x-(8y-2z-(x+y))-2(3y-10z))=?
(5x的"("是大括号,(8y的"("是中括号,而(x+y)后面的括号则是中括号,最后的括号是大括号.
请各位仁哥仁姐帮小妹我解答
人气：215 ℃ 时间：2020-06-13 16:45:27
解答
(4x-2y-z)-(5x-(8y-2z-(x+y))-2(3y-10z))
=(4x-2y-z)-(5x-8y+2z+x+y-6y+20z)
=4x-2y-z-6x+13y-22z
=-2x+11y-23z
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