pakai cara logaritma ya ka

Kelas 10 Matematika
Bab Logaritma

^ = pangkat

7^(x + 1) = 2^(3x + 2)
log 7^(x + 1) = log 2^(3x + 2)
(x + 1) . log 7 = (3x + 2) . log 2
(x + 1) . 0,845 = (3x + 2) . 0,301
0,845x + 0,845 = 0,903x + 0,602
0,845x - 0,903x = 0,602 - 0,845
-0,058x = -0,243
x = -0,243/-0,058
x = 4,19