Mathematics, 07.01.2020 14:31 fireman59937

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a tire shop counted 80 invoices at the end of the month. they charge $325 for a set of new tires and $50 for a set of used tires. the total dollar amount of the invoices was $6,750. let x represent the number of sets of new tires and y represent the number of sets of used tires. which system of equations represents the situation?

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a tire shop counted 80 invoices at the end of the month. they charge $325 f...