The sum of two integers is 65. If one of them is -31, find the other

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Solution

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By assuming Closure property of addition [a+b=c], Let, $a=−31,assumeb=x,c=65$ $=−31+x=65$ $=x=65+31$ ( By sending -31 from left hand side to the right hand side, it changes to 31) $=x=96$ By the calculation we got another integer is $96$