Algebra 2
posted by OLIO :) .
The length of a rectangle is 1 less than three times its width. The perimeter is 30 ft.
Find the length of this rectangle

P = 2L + 2W
30 = 2(3W1) + 2W
30 = 6W  2 + 2W
32 = 8W
4 = W
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(3 * 4)  1 = L