Jawabanmu

2014-09-13T20:05:48+07:00
19 karena log(5.19+5) = 2

log 100 = 2
2014-09-13T20:06:17+07:00
Log(5x + 5) = 2
^(a)logb = c ---> a^c = b
Berarti,...
10² = 5x + 5
100 = 5x + 5
x = 100 - 5
          5
x = 19

Semoga membantu.