SOLUTION: Can you show me how to set up this problem? What is the perimeter of a rectangle, given that the length is x yards and the width is 10 yards shorter? The perimeter is not given and

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Question 199990This question is from textbook
: Can you show me how to set up this problem? What is the perimeter of a rectangle, given that the length is x yards and the width is 10 yards shorter? The perimeter is not given and I don't know how to solve this equation.This question is from textbook

Answer by ankor@dixie-net.com(15652) About Me  (Show Source):
You can put this solution on YOUR website!
What is the perimeter of a rectangle, given that the length is x yards and the width is 10 yards shorter?
:
Just write what it says:
L = x
W = (x-10)
:
The perimeter equation:
P = 2L + 2W
Substitute; x for L, and (x-10) for W
P = 2x + 2(x-10)
Multiply what's inside the brackets
P = 2x + 2x - 20
Combine like terms
P = 4x - 20