Let the triplets' age be x, the sister's age is then x-5. product of their age as given xÂł.(x-5)=75749+x+x+x+x-5 x^4 - 5xÂł= 4x +75744 x^4 - 5xÂł -4x -75744=0 resolving the equation, we get x = 18 therefore, Age of ben,bob and bill is 18 so , age of stephanie is x-5 = 18-5 = 13 stephanie is 13 years old.
