add 3xy+7xy+{-5/2(xy)}
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Answer:
3xy + 7xy + {-5/2xy}
=> 3xy + 7xy + (-2.5 xy )
=> 3xy + 7xy - 2.5 xy
=> 10xy - 2.5 xy
=> 7.5 xy
There is one more process you can we solve by anyone :-
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