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¹⁰log y = 2 perlu diketahui : log y = ¹⁰log y (angka 10 biasa tidak ditulis)
⇒ y = 10² = 100
log(3x - 4) - log(x + 1) = log 100 ⇒ log a - log b = log(a/b)
⇒ log((3x - 4)/(x + 1)) = log 100
⇒ (3x - 4)/(x + 1) = 100
⇒ 3x - 4 = 100(x + 1)
⇒ 3x - 4 = 100x + 100
⇒ 97x = -104
⇒ x = -104/97
3x - 4 > 0 ---> x > 4/3 dan x+1 > 0 ---> x > - 1
maka x > 4/3
..
3x-4 = 100(x+1)
100x + 100 = 3x - 4
97 x = 104
x = - 104/ 97
krna x < 4/3 maka HP kosong
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