subtract the sum of 3a+6b+2c-9 and 5a+b+3c-5 from 7a-8b+5c+11
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first add (3a +6b +2c-9)+(5a+b+3c-5) you will get some answer....
now substrate 7a+8b+5c+11 from that results you will get answer....
sumant2009:
are you mad?
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