Let Nicole's be N
Then Sheila's = 2N + 2
Also, Steve's is: N + 2N + 2, or 3N + 2
We then get: 3N + 2 = 5N - 10
3N - 5N = - 10 - 2
- 2N = - 12
N, or Nicole is:
Sheila is: 2(6) + 2, or 14 years-old
Steve is: 3(6) + 2 = 20 years-old
That's it!! Nothing COMPLEX!!