SOLUTION: The width of a rectangle is 8cm less than its length. The perimeter is 44cm. Find the dimensions of the rectangle. I have the answer that length = 15cm and width = 7cm. I am

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: The width of a rectangle is 8cm less than its length. The perimeter is 44cm. Find the dimensions of the rectangle. I have the answer that length = 15cm and width = 7cm. I am       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 311368: The width of a rectangle is 8cm less than its length. The perimeter is 44cm. Find the dimensions of the rectangle.
I have the answer that length = 15cm and width = 7cm. I am asking for the formula to how this question was worked out. This is an example question for a placement test for my college. I know they will change the numbers, but the formula stays the same. Please help?

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
p=2(l+w)
p=44
w=l-8
44=2%28l-8%2Bl%29
44=2%282l-8%29
44=4l-16
60=4l%7D%7D%0D%0A%7B%7B%7B15=l
w=15-8=7