Question

Solve. There might be no solution or 2. Check for extraneous solutions

Answer 1

13.

`\log _9(15-4n)=(1)/(2)`

So:

`\begin{gathered} 9^(\log _9(15-4n))=9^{(1)/(2)} \\ 15-4n=3 \\ 4n=15-3 \\ 4n=12 \\ n=(12)/(4) \\ n=3 \end{gathered}`