Answer :

you need to distribute so then you get 15x-30=24 , after that you add the 30 with 24 if you want to get what x equals. Alright so now its 15x=54 then you divide the 15 to both side to get the x alone then your answer would be x= 3.6
log5(3x - 6) = 24
log5(3x) - log5(6) = 24
log15x - log30 = 24
1.176091259x - 1.477121255 = 24
                        +1.477121255    +1.477121255
                         1.176091259x = 25.477121255
                         1.176091259       1.176091259
                                              x = 36.44952015