Question

Solve for w in P = 2w + 2l, if P = 38 and l = 12.

Answer 1

\[P = 2w + 2l\]Subtract \(2l\) from both sides
\[P - 2l = 2w\]Divide both sides by 2
\[\frac{P-2l}{2} = w\]Now plug in your numbers to find the value of \(w\)

Answer 2

I still don't really get it though. .-.

Answer 3

What don't you get? The algebra, or how to plug in your numbers?

Answer 4

how to plug in the numbers.

Answer 5

Okay, well, where you see "P" replace it with "(38)". Where you see "l", replace it with "(12)".

What do you get?

Answer 6

38/12 is 3?

Answer 7

Uh, no.

\[w = \frac{P-2l}{2} = \frac{(38)-2(12)}{2}\]
What is 2*12?
What is 38 - 2*12?
What is (38-2*12)/2?

Answer 8

2x12 is 24 and 38-24 is 14 and 14/2 is 7

Answer 9

oooh okay. I get it. Thank you it helped a lot.

Answer 10

You got it!