What is the value of l in the following formula when w = 14 cm and P = 80 cm?

P = 2l + 2w

Question

What is the value of l in the following formula when w = 14 cm and P = 80 cm?

P = 2l + 2w

across · Answer

What have you tried?

anonymous · Answer

I am not sure how to do this. It would be better if someone was able to walk through with me on this.

anonymous · Answer

P=2L+2W
80=2L+2(14)
80=2L+28
80-28=2L+28-28
52=2L
52/2=2L/2
26=L

anonymous · Answer

Oh. That really is not that hard. I had the idea correct, I just didnt know where the numbers were supposed to go. THanks!

across · Answer

You are told to solve for $l$ in$$P=2l+2w.$$Moreover, you are told that $P=80$ and $w=14$. If you substitute these values into the above equation, you get$$80=2l+2\times14.$$Can you simplify this?

anonymous · Answer

You're welcome!