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The lenght of a rectangle is 3 inches less than twice the width if the perimeter of the rectangel is 18 inches find the width of the rectangel?
Wiki User
∙ 15y ago
In this rectangle we'll call the length L and the width W
We know that L + 3 = 2W
So, if we subtract 3 from each side we get L = 2W - 3
We also know that 2L + 2W = 18
Now we can substitute the L terms
2(2W - 3) + 2W = 18
4W - 6 + 2W = 18
4W + 2W = 18 + 6
6W = 24
W = 4
So, if L + 3 = 2W then L + 3 = 8.... therefore L = 5
So now, we'll check that the measurements we've ended up with work out...
2L + 2W = 18
5 + 5 + 4 + 4 does indeed = 18
Wiki User
∙ 15y ago
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