作业帮1/2(a+4b)-1/3(3a-6b) ;4a-(a-3b); a+(5a-3b)-(a-2b) ;3(2xy-y)-2xy ;x+[x+(-2x-4y)] 去括号,再合并同类
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1/2(a+4b)-1/3(3a-6b) ;4a-(a-3b); a+(5a-3b)-(a-2b) ;3(2xy-y)-2xy ;x+[x+(-2x-4y)] 去括号,再合并同类
1/2(a+4b)-1/3(3a-6b) ;4a-(a-3b); a+(5a-3b)-(a-2b) ;3(2xy-y)-2xy ;x+[x+(-2x-4y)] 去括号,再合并同类
1/2(a+4b)-1/3(3a-6b) ;4a-(a-3b); a+(5a-3b)-(a-2b) ;3(2xy-y)-2xy ;x+[x+(-2x-4y)] 去括号,再合并同类
1/2(a+4b)-1/3(3a-6b)
=1/2a+2b-a+2b
=-1/2a+4b
4a-(a-3b)
=4a-a+3b
=3a+3b
a+(5a-3b)-(a-2b)
=a+5a-3b-a+2b
=5a-b
3(2xy-y)-2xy
=6xy-3y-2xy
=4xy-3y
x+[x+(-2x-4y)]
=x+x-2x-4y
=-4y