Question

Express the formula P=2L+2W in terms of the width,W. Use the formula to find the width when the perimeter is 70 and the length is 22.

Answer 1

Width W = 13

Explanation:

P = 2L + 2W

if the perimeter P = 70

and Length L = 22

find the Width W

P = 2L + 2W

70 = 2(22) + 2W

70 - 44 = 2W

26 = 2W

W = 26 / 2

W = 13

therefore,

the Width W = 13

check:

P = 2L + 2W

70 = 2(22) + 2(13)

70 = 44 + 26

70 = 70 --- OK

Answer 2

The width is 13

Explanation:

From the question

P=2L+2W

where

L is the length

W is the width

To make W the subject move 2L to the left side of the equation

That's

2W = P - 2L

Divide both sides of 2 to make W stand alone

We have

`W = (P - 2L)/(2)`

when

P = 70

L = 22

W is

`W = (70 - 2(22))/(2) \\ W = (70 - 44)/(2) \\ W = (26)/(2)`

We have the final answer as

W = 13

Hope this helps you