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40% : 4=10%
6,4 : 4=1,6
1,6=10%
10% x 10=100%
1,6 x 10=16
16=100%
16 ton
ewentualnie
6,4 : 0,4=16
6400 kg - ⅖
x - 1
⅖x=6400 / x5
2x=32000
x=16000
x t = 1
z proporcji(na krzyz)
2/5x = 6,4t
x= 16 ton i taka odpowiedz