Let k be Kiko's present age

Let s be Kiko's sisters age.

We're given two equations:

- k = 6s
- k + 6 = 3(s + 6)

6s + 6 = 3(s + 6)

Typing this equation into our math engine to solve for s, we get:

s =

**4**

To solve for k, we substitute s = 4 into equation (1) above:

k = 6 * 4

k =

**24**