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If four positive integers a , b, c and d have a product of 8! and satisfy ab + a + b = 524 bc + b + c = 146 cd + c + d = 104 then the value of a - d is

Answer» If four positive integers a , b, c and d have a product of 8! and satisfy ab + a + b = 524 bc + b + c = 146 cd + c + d = 104 then the value of a - d is


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