Please help me answer this math problem!

The perimeter of a rectangle is 24 m. The length is 3 m more than twice the width. Find the dimensions.
What is the length __ m???

24 = x + x + 2x + 2x + 3 + 3
24 = 6x + 6
18 = 6x
3 = x

length = 2x + 3
= 9

width = x
= 3

Write down you knowns

Perimeter = 24 m

L = 2x + 3

W = x

Let x = unknown

P = 2L + 2W

Next, plug in the numbers in place of letters.

24 = 2(2x + 3) + 2x

Now solve for x in get width.
Distribute 2

24 = 4x + 6 + 2x

Combine like terms

24 = 4x + 2x + 6

24 = 6x + 6

Subtract 6 to both sides.
<