(4x-2y-z)-(5x-(8y-2z-(x+y))-2(3y-10z))=?

分类: 作业答案 • 2022-03-13 23:38:19

问题描述：

(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

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