化简:3x+2(y-x)-(-x-4y)=?
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化简:3x+2(y-x)-(-x-4y)=?化简:3x+2(y-x)-(-x-4y)=?化简:3x+2(y-x)-(-x-4y)=?3x+2(y-x)-(-x-4y)=3x+2y-2x+x+4y=2x
化简:3x+2(y-x)-(-x-4y)=?
化简:3x+2(y-x)-(-x-4y)=?
化简:3x+2(y-x)-(-x-4y)=?
3x+2(y-x)-(-x-4y)
=3x+2y-2x+x+4y
=2x+6y
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