Question 1107937: Three sisters, Amy,Beth, and Carly are different ages. Amy is 7 years older than Beth. Carly is twice the age of Beth. The sum of their ages is 47.
What are their ages?
Answer by Edwin McCravy(20059)   (Show Source):
You can put this solution on YOUR website! Three sisters, Amy,Beth, and Carly are different ages.
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Amy is 7 years older than Beth.
A = B+7
Carly is twice the age of Beth.
C = 2B
The sum of their ages is 47
A+B+C = 47
What are their ages?
Substitute B+7 for A and 2B for C in
A + B + C = 47
B+7 + B + 2B = 47
Simplify and solve for B.
Then to get A, substitute what you got for B
in A = B+7.
Then to get C, substitute what you got for B
in C = 2B.
Edwin
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