SOLUTION: A boy's age is three times the age of his sister. Their ages together total 16 years. What is the age of each?

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Question 369972: A boy's age is three times the age of his sister. Their ages together total 16 years. What is the age of each?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let sister be x years
brother will be 3x
3x+x =16
4x=16
divide both sides by 4
4x/4=16/4
x=4 sister's age
brother's age = 3*x = 3*4 =12 years