The formula for perimeter of a rectangle is given by: P=2l+2w Rearrange the formula to solve for l

Question

 i need to solve for l

Answer 1

P = 2L + 2W

Re-order the equation: 2L + 2W = P

Subtract 2W from each side: 2L = P - 2W

Divide the equation by 2: L = (P - 2W)/2

Answer 2

P=2l+2w

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

P-2w=2l

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

(P-2w)/2=l