来自邱家驹的问题
【x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快】
x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快
1回答
2020-07-1912:17
【x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快】
x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)怎样去括号?快
x+(-y+3)x-(-3-y)-(x-y)+33-(X+Y)
=x-y+3=x+3+y=-x+y+3=3-x-y