Question

The present as of people are 13 years and 7 years and X years ago the product of their ages was 55​

Answer 1

Let's call the age of the third person Y.

According to the problem, the present ages of the three people are 13, 7, and X.

X years ago, their ages were X+13, X+7, and Y.

We know that the product of their ages X years ago was 55:

(X+13)(X+7)(Y) = 55

We can simplify this expression by expanding the left side:

XY + 20X + 91Y + 91 = 55

Subtracting 91 from both sides and rearranging, we get:

XY + 20X + 91Y - 36 = 0

This equation is not solvable without additional information.