The tail of a kite is 1.5 feet plus twice the length of the kite. together, the kite and the tail are 15 feet 6 inches long. what is the length of the tail?

We know that the kite with the tail is 15 feet and 6 inches. While 6 inches is 0,50 foot, it's 15,5 feet. If the lenght of the kite is x, then:

15,5 = x + 1,5 + 2x
15,5 = 3x + 1,5     / - 1,5 (both sides)
14 = 3x             / : 3 (both sides)
x ≈ 4,66

The kite is approx .4,66 feet long. It means that the tail is about 15,5 - 4,66 = 10,84 feet long.

   Helpful Material:

1.5 = tail of a kite
Plus twice the length of the kite
Together = 15 feet in 6 inches 

Illustration: 15.6 ÷ 1.5 = 10.4
1.5 × 2 = 3                    
1.5 × 3 = 4.5             The most useful equation is 1.5 × 10. The reason why is be-  
1.5 × 4 = 6                 cause if you that is the closest number that you can use to 
1.5 × 5 = 7.5              divide.
1.5 × 6 = 9          
1.5 × 7 = 10.5           The length of the kite is 10.4. I hope this helps.
1.5 × 8 = 12
1.5 × 9 = 13.5
1.5 × 10 = 15
1.5 × 11 = 16.5
         

You didn’t put the necessary image to solve the question : p