Question

If now Jenny is twice as old as Leo, and 5 years ago she was three times as old as he was, how old are they now?

Answer 1

Leo is 10, Jenny is 20

Explanation:

Let's say that Jenny's current age is j, and that Leo's current age is l. With this, we can set up the following equations:

j=2l

j-5=3(l-5)

Let's use substitution and plug the first equation into the second one:

(2l)-5=3(l-5)

2l-5=3l-15

l=10

j=20

Hope this helps!