SOLUTION: Plz I don't get this a girl is b years old and her sister Is x years older than she is what will their average age be in 10 years time

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Question 691380: Plz I don't get this a girl is b years old and her sister Is x years older than she is what will their average age be in 10 years time

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Plz I don't get this a girl is b years old and her sister Is x years older than she is what will their average age be in 10 years time
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Now:
girl is b
sister is b + x
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In 10 years:
Girl is b+10
sister is b + x + 10
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Avg = ((b+10) + b+x+10))/2
= (2b + x + 20)/2