Help with this math equation

Question

There are 17 kites in a kite-flying contest at the beach. There are 3 times as many box kites as butterfly kites. There are 2 more dragon kites than butterfly kites. Which equation could be used to solve for the number of butterfly kites, x, in the contest?

Answer 1

x=3y, y=x/3

d=2+y = 2+x/3

x+y+d = 17

x+x/3 + 2 +x/3 = 17

5x/3 = 15

x/3 =3

x = 9 = number of box kites

y= 3 = number of butterfly kites

d = 5 = number of dragon kites