A hardware store sells a basic paintbrush for $7.20 each and charges $16.25 for a premium brush. If 48 brushes are sold for a total of $725, not including taxes, how many of each type of brush were sold? Set up, but do not solve, a system of linear equations which could be used to solve the problem. (Let x represent the number of premium brushes sold and y represent the number of basic brushes sold.)

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