# Greg build a picture frame with a perimeter of 50 in it is 14 in Long how wide is it?

The formula for perimeter is $2 \left(l\right) + 2 \left(w\right)$. If we substitute $l$ for 14, we get 28 for the total length of both $l ' s$. In order to find $2 w$, you must subtract 28 from 50, which is 22. Since this $2 w$, and we're looking for $w$ alone, you have to divide by two. $\frac{22}{2} = 11$, which means that each width is 11 inches.