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](/uploads/image/z/5543017-25-7.jpg?t=1%2F2%28a%2B4b%29-1%2F3%283a-6b%29+%3B4a-%28a-3b%29%3B+a%2B%285a-3b%29-%28a-2b%29+%3B3%282xy-y%29-2xy+%3Bx%2B%5Bx%2B%28-2x-4y%29%5D+%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%86%8D%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB)
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