Sunday, April 18, 2010

Sally is twice as old as her sister Anna, and Anna is ten years younger than her brother Sam. If Sam is 12, how old is Sally and Anna?

Answer: You must find the variable expressions; Sam: x, Anna: x-10, Sally: 2(x-10)


Sam is 12 years old.
Anna is 2 years old.
Sally is 4 years old

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