Mathematics, 07.07.2019 08:00, anaoliviahoy

Astore recived a delivery that consists of x boxes that weight 30 pounds each and y boxes that weight 20 pounds each. there are 64 total boxes in the delivery and they have combined weight of 1400 pounds .enter the number of boxes in the delivery that weight 20 pounds.

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Astore recived a delivery that consists of x boxes that weight 30 pounds each and y boxes that weigh...