Question

Given the following formula, solve for l.
(look at picture for question)

Answer 1

D

Explanation:

You have P=2(l+b)

First, you expand the right side of the equation and get P=2l+2b

Next, you subtract 2b from each side to get P-2b = 2l

Then divide by 2 to get l = (P-2b)/2

Answer 2

D

Explanation:

Given

P = 2(l + b) ← distribute parenthesis

P = 2l + 2b ( subtract 2b from both sides )

P - 2b = 2l ( divide both sides by 2 )

`(P-2b)/(2)` = l → D