SOLUTION: A girl is 3 times the age of her younger sister, and the sum of their ages is 20. What are the ages of the sisters?
Algebra.Com
Question 963374: A girl is 3 times the age of her younger sister, and the sum of their ages is 20. What are the ages of the sisters?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
x*3x=20
4x=20
x=20/4
x=5
3x=15
RELATED QUESTIONS
the sum of ages of two sisters is 38years.four years ago the age of the elder sister was... (answered by josgarithmetic)
The sum of a brother and sister age is 8 years. If the age of the sister is 7 years... (answered by ewatrrr,richwmiller)
The average age of two sisters is three times the age of the younger one . in seven... (answered by josgarithmetic,Glaviolette,MathTherapy)
The sum of ages of two sisters is 22years.six years ago,the product of their ages was... (answered by Alan3354,josgarithmetic)
A girl is half as old as her sister and is also two years younger than her brother. If... (answered by FrankM,MathTherapy)
Alexa and Brittney are sisters whose current ages have a sum of 43. Three times Alexa’s... (answered by josmiceli,ikleyn)
Erin has an older sister and a younger sister. Her older sister is one year more than... (answered by ewatrrr)
Molly's sister is three years younger than twice her age. If the sum of their ages is 24, (answered by stanbon)
Q The difference in age
between a girl and her younger sister is 4
years. The younger... (answered by josgarithmetic)