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Mathematics 11 Online
OpenStudy (anonymous):

Use two variables and two equations. Solve by any method you choose. Write your answer in the appropriate form. To earn money for college, Susan is making and selling earrings. Her weekly costs for advertising and phone calls are $36 and each pair of earrings cost $1.50 to produce. If Susan sells the earrings for $6 per pair, how many pairs must she sell per week to break even?

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