combine like terms and simplify
1. 3x - 2y -xy- (x-y +xy) +3xy+y-x
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I really so sorry I don't know please mark me as a brilliant
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1. 3x-2y-xy-(x-y+xy)+3xy+y-x.
3x-2y-xy-x+y-xy+3xy+y-x. (Because -×-=+ & -×+=-).
3x-x-x-2y+y+y-xy-xy+3xy.
2x-x-y+y+2xy+3xy. (Because +×-=- & largest number is important, -×+=- & largest number is important & -×-=+).
x+5xy.
I think this is your answer.
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