若2x+y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
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若2x+y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
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.
再问: 昂。。。真的错了吖= = 2x+3y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
再答: 2(3x-2y)-(x-y)+(-x+9y) =6x-4y-x+y-x+9y =4x+6y =2(2x+3y) =2×2012 =4024
=6x-4y-x+y-x+9y
=4x+6y
题目是错的,请核对题目.
再问: 昂。。。真的错了吖= = 2x+3y=2012,则代数式2(3x-2y)-(x-y)+(-x+9y)=
再答: 2(3x-2y)-(x-y)+(-x+9y) =6x-4y-x+y-x+9y =4x+6y =2(2x+3y) =2×2012 =4024
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