You can put this solution on YOUR website! Assume this is the problem
subtract 20 from both sides
using natural logs
the log equiv of exponents
(x-8)*ln(7) = ln(275)
divide both sides by ln(7)
x - 8 =
use the calc
x - 8 = 2.88645
x = 2.88645 + 8
x = 10.88645
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You can confirm this, replace x with 10.88645 in the original equation, use your calc