Remember variable are never a number , it can be symbols or alphabets.
Now proceedings to answer :-
1. 15 - (a + 6)
Answer :- a
2. 25 = n = 5
Answer :- n
3. C = 48
Answer :- C
4.37 - m = 29
Answer :- - m
5. Z = 24 - 18
Answer :- z
6. 15 x³
Answer :- x³
7. 29+p=31
Answer :- P
8. b-30÷10
Answer :- B
9. 24s+9=57
Answer :- s
10. (16÷4) -3=×
Answer :- x
{if it's multiplication sign then no variable}
hope it helps!
happy learning:)
