Answer: Teo is 9 years old and Richard is 27 years old.
Explanation:
First of all, create expressions which represents Teo's and Richard's age:
x = Teo's Age
2x + 9 = Richard's Age
Now create an equation which can be used to find Teo's age and Richard's Age:
(x) + (2x)+9 = 33
(x) + (2x) = 24
3x = 24
x = 9
From this, we can conclude that Teo is 9 years old.
Now substitute 9 into Richard's Age expression which is 2x+9
2*9+9 = 27
From this, we can conclude that Richard is 36 years old.