化简
过程
百分之百全对
(1) (x+1/4)-(2x-1/3)
(2) y-3(4y-3x)
(3) (2a+3b)-1/2(4a-5b)
(4) 1/2x-(6-3x)+3(-4+1)
化简
过程
百分之百全对
(1) (x+1/4)-(2x-1/3)
(2) y-3(4y-3x)
(3) (2a+3b)-1/2(4a-5b)
(4) 1/2x-(6-3x)+3(-4+1)
1) (x+1/4)-(2x-1/3)=x+1/4-2x+1/3=-x+7/12
(2) y-3(4y-3x)=y-12y+9x=-11y+9x
(3) (2a+3b)-1/2(4a-5b)=2a+3b-2a+5/2b=11/2b
(4) 1/2x-(6-3x)+3(-4+1)=1/2x-6+3x-12+3=-7/2x-15
(1) (x+1/4)-(2x-1/3)=7/12-x
(2) y-3(4y-3x)=9x-11y
(3) (2a+3b)-1/2(4a-5b)=11/2b
(4) 1/2x-(6-3x)+3(-4+1)=7/2x-15