Answer:
Option D
Explanation:
Take a look at the steps below;

To derive the second step we multiplied either side by 4, and as the 4 and 4 cancel each other out on one side of the equation, the other side being 4 * 4 = 16, we receive 6 + n = 16. The third step was found through the subtraction of 6 on either side of the equal sign. 16 - 6 = 10, so your solution is Option D