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TV sets, some weighing 30 kg each and the other weighing 50kg each, total weight of 880kg If there are 20 TV's?

A shipment of TV sets, some weighing 30 kg each and the other weighing 50 kg each, has a total weight of 880 kg. If there are 20 TV sets all together, how many weigh 50 kg and how many weigh 30 kg?

Public Comments

1. 30x+50y=880 x+y=20 x=20-y 30(20-y)+50y=880 600-30y+50y=880 20y=280 y=14 x=6 6 weigh 30g