计算:3(x﹣y)﹣2(x+y)﹣5(x﹣y)+4(x+y)+3(x﹣y).-七年级数学

题目简介

计算:3(x﹣y)﹣2(x+y)﹣5(x﹣y)+4(x+y)+3(x﹣y).-七年级数学

题目详情

计算:3(x﹣y)﹣2(x+y)﹣5(x﹣y)+4(x+y)+3(x﹣y).
题型:计算题难度:中档来源:同步题

答案

解:3(x﹣y)﹣2(x+y)﹣5(x﹣y)+4(x+y)+3(x﹣y)
= 3(x﹣y)﹣5(x﹣y)+3(x﹣y)﹣2(x+y)+4(x+y)
= x﹣y+2(x+y)
= x﹣y+2x+2y
=3x+y.

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