Answer:
(5xy)+(-4xy)+(9xy)+(-7xy)
=5xy-4xy+9xy-7xy
=5xy+9xy-4xy-7xy
=14xy-11xy
=3xy
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Answer:
5xy+(-4xy) +9xy= 10xy
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Verified answer
(5xy)+(-4xy)+(9xy)+(-7xy)
=5xy-4xy+9xy-7xy
=5xy+9xy-4xy-7xy
=14xy-11xy
=3xy