what have you tried?

here are the rules you need:

take the log of both sides. use the laws of logs i gave you above to simplify the expression.2) Solve: 2^x = 3^(x+3)

same idea here. you may also want to use:3) Solve: log(x^2 -1) = 2 + log (x+1)

try them and see what you get