Question

The sum of Richard's age and Ruel's age is 60. Nine years ag, Richard was twice as old as Ruel then. How old is Ruel?

Answer 1

Ruel is 23 years old.

Explanation:

Let
`x =`Ruel's age and `y =` Richard's age hence we have that

`x+y=60` and `y-9=2*(x-9)`

Solving this system of equation yields `x=23`