The length of one side of a triangle is 3 feet less than twice the length of its second side. The third side is 2/3 of the sum of the lengths of the first 3 sides. Find the length of all three sides if the perimeter is 6.5
+37158 the sum of the lengths of the first 2 sides I assume this is what you meant
l + l-3 + 2/3 (l + l-3) = 6.5
2l + 4/3 l - 3 - 6/3 = 6.5
10/3 l - 5 = 6.5
10/3 l = 11.5
l = 11.5 * 3/10
l = 3.45 ft
l-3 = .45 ft
final leg = 2.6 ft
