The perimeter of a rectangle is 80 inches. The length of the rectangle is three times its width. How wide is the rectangle?

The width is 10 inches.

Step-by-step explanation: Perimeter = 2(w + L)

the length is 3 times width, so substitute 3w for L in the equation.

2(w +3w) = 80

2(4w) =80

8w = 80

w = 10

the Length would be 3(10) = 30 inches

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