Question 163736

Write an equation for each statement, put it in terms of E
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Eric is 2 years younger than his brother Bill
E = Bi - 2
Bi = E + 2
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and 2 years older that his  sister Beth.
E = Be + 2
Be = E - 2
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 The sum of the 3 is 60 years.
E + Bi + Be = 60 
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What is the age of each person?
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Substitute (E+2) for Bi and (E-2) for Be 
E + (E+2) + E-2) = 60
2's cancel so you have:
3E = 60
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E = 20, then Bi = 22, Be = 18
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