A and B are positive integers. If A + B + AB = 65, then what is the difference between A and B (A, B ≤ 15)?
A + B + AB = 65 A(1 + B) + B = 65 A = (65 − B)/(1 + B) As A and B < 15 let B=10 then A=55/11 = 5 Therefore A=5 and B=10 will satisfy and difference =10-5=5
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