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ziemniaki: 5x = 5*240=1200 kg
buraki: x = 240 kg.
kapusta: x+120 = 240+120=360 kg.
razem 1800 kg.
7x=1800-120
7x=1680 |: 7
x= 240 kg.
sprawdzenie 1200+360+240=1800kg.
odp. zebrano 1200kg ziemniaków, 240 kg buraków i 360 kg kapusty.
5x- ilosc ziemniaków
x+120- ilość kapusty
x+5x+x+120=1800
7x=1680/7
x=240
240 - buraki
5*240=1200 - ziemniaki
240 + 120 = 360 - kapusta