SOLUTION: Solve {{{ log ( 7,(x+8) ) - log ( 7,(x-5) ) = log ( 7,4 ) }}}

Question 476520: Solve

Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!

==>
==>(x+8)/(x-5) = 4, because the logarithmic function is 1-to-1.
==> x + 8 = 4x - 20
==> 28 = 3x
==> x = 28/3.
This value satisfies the original equation, and so is the final answer.
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