化简并求值“2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=12,y-1

问题描述:

化简并求值“2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=12,y-1

2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=12,y-1
=-(x+y)
=-x-y
=-12+1
=-11;
很高兴为您解答,skyhunter002为您答疑解惑
如果本题有什么不明白可以追问,0.0 题目如果是-2呢我好像打错了 sorry2(x+y)-2/3(x-y)-3(x+y)+2/3(x-y),其中x=-2,y-1=-(x+y)=-x-y=2+1=3;