More Math Help

[loveapples]

So I'm doing logs??in math class, and am stuck on 3 questions. >_>

1. ln 45 + ln (x-4) = ln (5x-4)

2. log (x^2 - 49) - 1 = log (x + 7)

3. log'3'(13-x) - log'3'(x+3) = 1

(That's Log base 3 (13-x) minus Log base 3 (x+3) equals to 1)