Posted by Sara on Monday, April 11, 2011 at 2:24am.
I will assume that all logs have the same base.
log(3x -9) = log [3^2*(x+3)/(3^3]
= log[(x+3)/3]
Therefore
3x -9 = (x+3)/3
9x -27 = x +3
8x = 30
x = 3.75
Check:
log (3x -9) = log 2.25 = 0.35218
2log3 -log27 + log(6.75)
= 0.95424 -1.43136 + 0.82930
= 0.35218
It makes no difference what log base you choose, as long as it is the same for all terms. (I chose base 10 when checking)
Related Questions
math(Please help) - 1) use the properties of logarithms to simplify the ...
pre calculous - use the properties of logarithms to write the expression as a ...
Algebra 2 logarithms - Use the properties of logarithms to evaluate the ...
Precalculus - I'm studying for my precalc exam and have completed 42 ...
Logarithms - Use the properties of logarithms to find the exact value of the ...
algebra 2 logaithms - Use the properties of logarithms to evaluate/simplify the...
exact logarithms - Use the properties of logarithms to find the exact value of ...
math - write as a single logarithm: -2logbase3(1/x)+(1/3)logbase3(square root of...
math - Logarithm!!! Select all of the following that are true statements: (a) ...
Math Help Please - Which of the following expressions is equal to log (x sqrt-y...
For Further Reading
