Appendix D - Exercise Set - Page 994: 14

{$-1,-5$}

Step 1: $|6+2n|=4$ Step 2: Using the absolute value property, $6+2n=4$ or $6+2n=-4$. Step 3: $6-6+2n=4-6$ or $6-6+2n=-4-6$ Step 4: $2n=-2$ or $2n=-10$ Step 5: $n=-1$ or $n=-5$ Step 6: Therefore, the solution set is {$-1,-5$}.