Hello there!
The following will show you
T = tyler
O = olivia
O = 2t - 6
when you include numbers, it is represented by:
O = (2 * 9) - 6
Now, let's solve this to find out just how old Olivia is.
2 * 9 = 18
18 - 6 = 12
Olivia is 12
This means that olivia is 3 years older than tyler
I hope I helped!
~ Fire