mathematics... asap

Question 1 Solve these equations for r, showing working. If the equation has no solution (there is no value of r that satisfies the equation) clearly explain why this is so. All the answers must given in the exact form (i.e. no rounded decimals) (a) log, (log, (3.1)) = 0 (b) ex-5246 = 1 (c) log:(x2 - 9) - log;(r + 3) = 2 - log;(r + 1) (d) 97 - 2.37+1 = 7