Mathematics, 06.08.2021 21:00 FireFlight

Reiko needs to mail her Christmas cards and packages and wants to keep her mailing costs to no more than $500. The number of cards is at least 4 more than twice the number of packages. The cost of mailing a card (with pictures enclosed) is $3 and for a package the cost is $7 a. what is the system of equations that models the situation?

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