SOLUTION: Please help me solve this problem: A window is 21 inches wide, and it's perimeter is 112 inches. What is the length of the window?

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Question 521173: Please help me solve this problem: A window is 21 inches wide, and it's perimeter is 112 inches. What is the length of the window?
Answer by geometryworm7271(30) About Me  (Show Source):
You can put this solution on YOUR website!
the formula for perimeter is 2w+2l so if w=21 2w=42 and 112-42=70 so 2l=70 and l=35