Marissa earned $560 in the summer. Sheearned $40 each week for part of – InterviewSolution

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1.	Marissa earned $560 in the summer. Sheearned $40 each week for part of thesummer and $60 each week for the rest. Ifshe earned $40 each week twice as oftenas she earned $60, how many weeks didshe earn $40?
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