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Math·Algebra·Linear equations in two variables

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Odalys ordered mulch and river rock, which cost a total of $242. The given equation $22.5x+26.75y=242$ represents the relationship between the number of cubic yards of mulch, $x$, and the number of tons of river rock, $y$, Odalys ordered.

How much more, in dollars, did a ton of river rock cost Odalys than a cubic yard of mulch?

1

4.25