Answer:

Step-by-step explanation:
Hello, please consider the following.

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log(3x) = log(2x-4)
taking antilog of both sides:
3x = 2x - 4
3x - 2x = -4 [subtracting 2x from both sides]
x = -4
and we're done already!
Percent of Change:
Difference/Original
(20-16)/16 = 4/16 = 1/4 = 25% increase
25 anything raised to zero equals one