The sum of numerator and denominator is 18. If 9 is added to numerator then it will become 1 less than 3 times the denominator. Find the fraction and enter the product of numerator(x) and denominator (y)
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Hello,
let n = numerator , d = denominator,
as n + d = 18,
n = 18 - d (1st),
n + 9 = 3d - 1(2nd),
substitute(1st) into (2nd),
18 - d + 9 = 3d - 1
4d = 28
d = 7, n 18 - 7 = 11 ,
therefore n / d = 11 / 7 ,then d x n = 7 x 11 = 77,
thanks...