SOLUTION: Solve for x.
log3 (x+4) - log3 (x-4) = 1
Check the validity of each solution in the original equation.
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Question 437730: Solve for x.
log3 (x+4) - log3 (x-4) = 1
Check the validity of each solution in the original equation.
Found 2 solutions by stanbon, Gogonati:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solve for x.
log3 (x+4) - log3 (x-4) = 1
----------
log3[(x+4)/(x-4)] = 1
----
(x+4)/(x-4) = 3
---
x+4 = 3x-12
2x = 16
x = 8
================
cheers,
Stan H.
Answer by Gogonati(855) (Show Source): You can put this solution on YOUR website!
, apply logarithmic properties write:
, because we have log. with the same base on both sides.
Assume x-4 different from zero or x different from 4, multiply both sides by x-4
x+4=3(x-4) solving this equation find x=8, which is the solution.
Done.
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