SOLUTION: if the length of a rectangluar parking lot is 9 meters less than twice its width, and the perimeter is 342 meters, find the length of the parking lot.

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Question 264267: if the length of a rectangluar parking lot is 9 meters less than twice its width, and the perimeter is 342 meters, find the length of the parking lot.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
we have 2 formulas
(i) L+=+2w-9
(ii) 342+=+2W+%2B+2L
by substitution, we get
(iii) 342+=+2W+%2B+2%282W-9%29
and then
(iv) 342+=+6W+-+18
add 18 to get
(v) 360+=+6W
divide by 6 to get
W = 60 meters
and then
L = 111 meters