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3x - modele Tomka
3x + 16 -- modele Kasi
x + 3x + 3x + 16 = 303
7x + 16 = 303
7x = 287
x = 41
3x = 123
3x + 16 = 139
Odp: Janek ma 41modeli, Tomek 123, a Kasia - 139.
Pozdrawiam ;)
3x-tomek
3x+16-kasia
3x+x+3x+16=303
7x=287/:7
x=41
janek-41
tomek-123
kasia-139 .