SOLUTION: Sergio is five times as old as Abby. Lino is twice as old as Abby. Abby is twelve years younger than Lino. How old is Sergio?

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Question 1023281: Sergio is five times as old as Abby. Lino is twice as old as Abby. Abby is twelve years younger than Lino. How old is Sergio?
Answer by Alan3354(69443) About Me  (Show Source):
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Sergio is five times as old as Abby. Lino is twice as old as Abby. Abby is twelve years younger than Lino. How old is Sergio?
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S = 5A
L = 2A
L = A + 12
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L = 2A
L = A + 12
2A = A + 12
A = 12
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S = 5A
Sergio is 60.