Answer:
Aryan is 14 years old
Step-by-step explanation:
If we let "A" represent Aryan's age, and "S" would represent Sarah's age, then we can make the following equations...
S = 2A - 6
S + A = 36
Now we sub in the value of S in terms of A and get...
S + A = 36
(2A - 6) + A = 36
2A - 6 + A = 36
3A = 36 + 6
3A = 42
A = 14
