SOLUTION: The ratio of the ages of 3 children is 1:3:5. The oldest child is 12 years older than the youngest child. How old is the middle child?

SOLUTION: The ratio of the ages of 3 children is 1:3:5. The oldest child is 12 years older than the youngest child. How old is the middle child?

Algebra.Com

Question 1131352: The ratio of the ages of 3 children is 1:3:5. The oldest child is 12 years older than the youngest child. How old is the middle child?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
ages are x, 3x, 5x
5x=x+12
4x=12
x=3
ages are 3,9,15
the middle child is 9
RELATED QUESTIONS
The Lee`s have 3 children. The oldest is twice as old as the youngest. The middle child... (answered by stanbon)

i tried multiplying and adding but i don't think i did it right here is my question:... (answered by josgarithmetic)

the square of my youngest child's age is 9 more then the product of 17 and the age of my... (answered by KMST)

Mrs brown has 6 children and each child is 4 years older than the next youngest. The... (answered by MathTherapy)

The Lee�s have three children. The oldest is twice as old as the youngest. The middle... (answered by Fombitz)

A man has three children. The oldest child is three times as old as the youngest. The... (answered by josgarithmetic)

The Lee's have three children. The oldest is twice as old as the youngest. The middle... (answered by stanbon)

Lee has 3 kids the oldest is twice as old as the youngest the middle child is 5 years... (answered by tenkun)

1. A woman has 4 children. The eldest is 3 years older than the second child, who is 3... (answered by stanbon)