liuchenhai001
幼苗
共回答了15个问题采纳率:86.7% 举报
1.-2n-(3n-1)=-2n-3n+1=-5n+1=1-5n
2.a-(5a-3b)+(2b-a)=a-5a+3b+2b-a=5b-5a
3.-3(2s-5)+6s=-6s+15+6s=15
4.1-(2a-1)-(3a+3)=1-2a+1-3a-3=-1-5a
5.3(-ab+2a)-(3a-b)=-3ab+6a-3a+b=-3ab+3a+b=3a+b-3ab
6.14(abc-2a)+3(6a-2abc)=14abc-28a+18a-6abc=8abc-10a
7.3(xy-2z)+(-xy+3z)=3xy-6z-xy+3z=2xy-3z
8.-4(pq+pr)+(4pq+pr)=-4pq-4pr+4pq+pr=-3p
1年前
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