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