Mathematics, 10.01.2021 21:20 chantianabess36

Seventh graders collected some gold sand on a class field trip. Class 7A collected 40 oz of gold sand that contains 12% gold.
Class 7B collected 55 oz of gold sand that contains 11% gold.
How much pure gold did 7A collect?

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Seventh graders collected some gold sand on a class field trip. Class 7A collected 40 oz of gold sa...