Question

The equation P = 2(l + w) can be used to find the perimeter P of a rectangle with length l and width w. Solve the equation for w to produce a formula for finding the width of a rectangle given its perimeter and length.

The formula is w =

Answer 1

`w = (P - 2l)/(2)`

Explanation:

In this case, we will just simplify the given formula of the perimeter and re-arrange it to get the value of w.

`P = 2(l + w)\\P = 2l + 2w\\P - 2l = 2w\\(P - 2l)/(2) = w`