化简(-3x+y)+(4x-3y)
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化简(-3x+y)+(4x-3y)
化简(-3x+y)+(4x-3y)
化简(-3x+y)+(4x-3y)
(-3x+y)+(4x-3y)=-3x+y+4x-3y
=x-2y
x-2y
=x-2y
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