need help with 2 questions.

e^(3s) = r

would it be 3s = r ? would i take the log of each side? since it equals (r) and not a number i can't get (s) byself?

i just did log7t = g

and what i did with that one was 7t =10g but since there is not base or exponent?? not sure if that is the right answer.

since there is no exponet would it be zero? how can i log both sides?

then i divided the 10/7 getting (t) by itself. which gave me 1/7 = t ??

can anyone help??