Question

a mirror should be centered on a wall. the mirror is 3 feet wide. the wall is 12 feet wide. how many feet should appear on either side?

Explanation:

Step1: Find the remaining width of the wall

The wall is 12 feet wide and the mirror is 3 feet wide. The remaining width of the wall on both sides of the mirror is $12 - 3=9$ feet.

Step2: Divide the remaining width equally

Since we want to center the mirror, we divide the remaining 9 - foot width equally between the two sides of the mirror. So, $x=\frac{9}{2}=4.5$ feet.

Answer:

4.5