Answer:
x = 33
Step-by-step explanation:
Log (3x + 1) = 2
(3x + 1 ) = 10²
Note : the log is in base 10
3x + 1 = 100
Subtract 1 from both sides
3x +1 -1 = 100 - 1
3x = 99
Divide both sides by 3
3x/3 = 99/3
x = 33
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