Answer
$$n=\frac{-71}{12}$$
Work Step by Step
$$\frac{2}{3} +n +6= \frac{3}{4}$$
$$\frac{8}{12} +n +6= \frac{9}{12}$$ $$n+\frac{72}{12}=\frac{1}{12}$$
$$n=\frac{-71}{12}$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.