SOLUTION: Kate is 12 years old. His age is 4 times the age of Robbie. Find the age of Robbie.

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Question 550286: Kate is 12 years old. His age is 4 times the age of Robbie. Find the age of Robbie.
Answer by TutorDelphia(193) About Me  (Show Source):
You can put this solution on YOUR website!
We can reason this problem out. If Kate is 12 and 4 times Robbie's age, Robbie must by 3 because 3*4=12

Doing this using algebra we see that:
k=12
k=4*r
12=4*r
r=3