SOLUTION: Eighteen year old Manolo is 4 years older than twice as old as his sister Julia. How old is Julia?

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Question 1012789: Eighteen year old Manolo is 4 years older than twice as old as his sister Julia. How old is Julia?
Answer by macston(5194) About Me  (Show Source):
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M=Manola's age=18; J=Julia's age
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M=2J+4
M-4=2J
18-4=2J
14=2J
7=J
ANSWER: Julia is 7 years old.