Question

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

Answer 1

l=‒2w+p/2

Explanation:

p=2(L+w)

p=2L+2w(add ‒2w on both sides)

‒2w+p=2L+2w-2w

‒2w+p=2L

‒2w+p/2=2L/2

L=‒2w+p/2

i hope it helps you.

Answer 2

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

Explanation:

Given

P = 2(l + w) ← distribute right side

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

P - 2w = 2l ( isolate l by dividing both sides by 2 )

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