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Bab Bilangan Berpangkat
Matematika SMP Kelas IX

3^(3x - 1) . 5^(3x) = 75
3^(3x) . 5^(3x) . 3^-1 = 75
3^(3x) . 5^(3x) . 1/3 = 75
3^(3x) . 5^(3x) = 75 . 3
(3 . 5)^(3x) = 225
15^(3x) = 15^2
3x = 2
x = 2/3

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Mapel : Matematika
Kelas : X SMA
Bab : Eksponen dan Logaritna

Pembahasan :
3^(3x - 1) . 5^(3x) = 75
3^(3x) . 5^(3x) . 1/3 = 75
(3 . 5)^3x = 225
15^3x = 225
15^3x = 15²
3x = 2
x = 2/3