已知A+2(x-xy+y)=2x+3y,则A=————————

问题描述:

已知A+2(x-xy+y)=2x+3y,则A=————————

Y + 2 X Y = A

A=y+2xy

A=2x+3y-2(x-xy+y)
=2x+3y-2x+2xy-2y
=y+2xy

我很无聊!!!
A=2x+3y-2(x-xy+y)
=2x+3y-2x+2xy-2y
=y+2xy