Solve the equation LaTeX:  \displaystyle \log_{4}(x + 71)-\log_{4}(x + 23)=1 .

Using the quotient property of logarithms gives LaTeX:  \displaystyle \log_{4}\frac{x + 71}{x + 23} = 1 . Making both sides of the equation exponents on the base LaTeX:  \displaystyle 4 gives LaTeX:  \displaystyle \frac{x + 71}{x + 23}=4 . Clearing the fractions by multiplying by the LCD gives LaTeX:  \displaystyle x + 71=4 x + 92 . Isolating LaTeX:  \displaystyle x gives LaTeX:  \displaystyle x = -7 .