3. Add: (i) 14x + 10y - 12xy - 13, 18 - 7x-10y + 8xy, 4xy
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Answer:
=14x+10y-12xy-13-07x-10y+8xy+18+4xy
=(14x-7x)+(10y-10y)+(-12xy+8xy+4xy)
=7x+0+0
=7x
I hope it will helpful for you
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