MTH208
posted by Carlos Medina .
The perimeter of a rectangle equals the sum of the lengths of its four sides. If the width of a rectangle is 3 inches and its perimeter is 42 inches, find the length of the rectangle

P = 2L + 2W
42 = 2L + 2(3)
42 = 2L + 6
42  6 = 2L
36 = 2L
18 = L
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