3a=11-2
3a=9
---------
9/3=3
---------
A=3
~~~~~~
Not sure on the second one.
Answer:
I don't understand what your asking
Step-by-step explanation:
The answer is y-9,27 is 3
For number 14: 20 is not a perfect number and 21 is a perfect number
for number 15: 7 and 9
& 11 and 13
Do you what the T,r and s stand for?