Question

Students were asked to write a formula for the length of a rectangle by using the formula for its perimeter,p=2L+2w

Answer 1

L = (P - 2W) / 2

Explanation:

Given:

P = 2L + 2W

Where,

P = perimeter of a rectangle

L = length of the rectangle

W = width of the rectangle

Make L the subject of the formula

P = 2L + 2W

Subtract 2W from both sides

P - 2W = 2L + 2W - 2W

P - 2W = 2L

Divide both sides by 2

(P - 2W) / 2 = 2L / 2

L = (P - 2W) / 2

The answer is L = (P - 2W) / 2