5 log 30-5 log 6+5 log 5

5 log 30 - 5 log 6 + 5 log 5 = 5 log 30/6 + 1
                                          = 5 log 5 + 1
                                          = 1 + 1 = 2
jawabannya 2

semoga bermanfaat ,,maaf kalau salah