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The length of a rectangle is 1 less than three times its width. The perimeter is 30 ft.

Find the length of this rectangle

1 answer

P = 2L + 2W

30 = 2(3W-1) + 2W

30 = 6W - 2 + 2W

32 = 8W

4 = W

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(3 * 4) - 1 = L

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