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29-09-2017
Mathematics

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The length of a rectangle is 3 meters less than 3 times the width. the perimeter is 42 meters. find the width.

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harpazo harpazo

29-09-2017

Let x = width

Let length = 3x - 3

Let perimeter = 42

42 = 2x + 2(3x - 3)

42 = 2x + 6x - 6

42 = 8x - 6

42 + 6 = 8x

48 = 8x

48/8 = x

6 = x

The width is 6 meters.

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