(-3xy-7y)+[4x-3(xy+y-2xy)]怎么解答

分类: 作业答案 • 2021-12-20 08:47:05

问题描述：

答

(-3xy-7y)+[4x-3(xy+y-2xy)]
=(-3xy-7y)+(4x-3xy-3y+6xy)
=-3xy-7y+4x+3xy-3y
=4x-10y