Question

The formula for the perimeter of a rectangle is P = 2l + 2w. Solve the formula for l

in terms of P and w.

Answer 1

P/2 -w = l

Explanation:

P = 2l + 2w

Subtract 2w from each side

P-2w = 2l + 2w-2w

P -2w = 2l

Divide each side by 2

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

P/2 -w = l