Thursday, June 5, 2014

Solve the logarithm equation:log (2x-2) = log (x-2) + 1

log (2x-2) = log (x-2) + 1


we will
use logarithm properties to find the value of x.


First we know that
log 10 = 1


==> log (2x-2) = log (x-2) + log
10


Now we know that log a + log b = log
ab


==> log (2x-2) = log
(10*(x-2)


==> log (2x-2) = log (10x
-20)


Now, we know that if log a = log b ==> a =
b


==> (2x-2) = 10x
-20


==> 8x = 18


==> x =
18/8= 9/4= 2.25


Then the solution to the equation is
9/4 = 2.25.

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