If log 27 = 1.935, then what is the value of log 9

Question

If log4 + log(13x+1) = log(5x+9) + 1, then what is the value of x?

Note: Assume all log represented is to the base of 10.

Answer 1

Log (27) = 3 × Log (3) = 1.935
Log (3) = 0.645
2 × Log (3) = 2 × 0.645 = 1.29
Log (9) = 1.29.