Problem

Solve the logarithmic equation.
\[
\ln (9 x+8)-\ln x=\ln 10
\]

What is the equivalent algebraic equation that must be solved?
A. $(9 x+8) x=e^{10}$
B. $\frac{9 x+8}{x}=10$
C. $\frac{9 x+8}{x}=e^{10}$
D. $(9 x+8) x=10$

Answer

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Answer

So, the final answer is \(\boxed{\frac{9 x+8}{x}=10}\)

Steps

Step 1 :\(\ln (9 x+8)-\ln x=\ln 10\)

Step 2 :Using the properties of logarithms, rewrite the equation as \(\ln \left(\frac{9 x+8}{x}\right)=\ln 10\)

Step 3 :Since the natural logarithm is a one-to-one function, equate the arguments of the logarithms to get the equivalent algebraic equation: \(\frac{9 x+8}{x}=10\)

Step 4 :So, the final answer is \(\boxed{\frac{9 x+8}{x}=10}\)

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