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OpenStudy (anonymous):
The sum of Joy's age and her brother's age is 24. Her brother's age is 3 years older than twice Joy's age. What is the difference, in years, between Joy's age and her brother's age?
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OpenStudy (anonymous):
I'd start by subtracting 3 from 24. From there, divide 21/2 since he is twice her age +3 years.
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