Question

若2x+y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=

Answer 1

2(3x-2y)-(x-y)+(-x+9y)
=6x-4y-x+y-x+9y
=4x+6y
题目是错的，请核对题目。

追问

昂。。。真的错了吖= = 2x+3y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=

追答

2(3x-2y)-(x-y)+(-x+9y)
=6x-4y-x+y-x+9y
=4x+6y
=2(2x+3y)
=2×2012
=4024

Answer 2

2(3x-2y)-(x-y)+(-x+9y)=
2(3x-2y)-(x-y)+(-x+9y)=6x-4y-x+y-x+9y=4x+6y=.2（2x+3y）=2*2012=4024........

你的已知条件写错了 或者是题出错了吧 好好看看

追问

2x+3y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=