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Solution:
Given equation:
log3x - 2125 = 3
Apply anti-log on both sides
125 = (3x - 2)3
53 = (3x - 2)3
If the exponents are equal, bases must be equal
5 = 3x - 2
5 + 2 = 3x
7 = 3x
x = 7/3
Summary:
The solution of log3x - 2125 = 3 is x = 7/3