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The Gonzalez Family

The four children in the Gonzalez family have a combined age of 43 years. Maria's oldest brother is six times as old as she is. Her next-to-oldest brother is 3 years older than she is, and her sister is twice Maria's age. How old is each of the Gonzalez children?

(Source: Adapted from Mathematics Teaching in the Middle School, May 1996)

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