Bobby has 3 times as many spaceships as his friend. Bobby has 21 spaceships. How many spaceships does his friend have?

Respuesta :

well he obviously he has  7 because all  u do is divide 3 by 21 and you get 7
21 = 3x

X is the amount that his friend has. 

21/3 = 7

7*2 = 21

x = 7

Answer: His friend has 7 spaceships.