若2x+3y=2010,则代数式2(3x-2y)-(x-y)+(-x+9y)=( )

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若2x+3y=2010,则代数式2(3x-2y)-(x-y)+(-x+9y)=( )
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若2x+3y=2010,则代数式2(3x-2y)-(x-y)+(-x+9y)=( )
若2x+3y=2010,则代数式2(3x-2y)-(x-y)+(-x+9y)=( )

若2x+3y=2010,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
=2(2x+3y)
=2*2010
=4020

2(3x-2y)-(x-y)+(-x+9y)=6x-4y-x+y-x+9y=4x+6y=2(2x+3y)=2×2010=4020