Úloha ID 354 - 
Za předpokladu, že platí následující vztahy: x − 4 < y , a zároveň: 2x = 6y.
Správná odpověď je: D
Z čísla x,y můžeme třeba dosadit 0,0, tedy by hodnoty vpravo i vlevo byly stejné. Můžeme ale také dosadit třeba x=3, y=1. Tehdy už hodnoty stejné nesjou a správná odpověď je tak D.
Přesnějším řešením je nakreslit si podmínky zadání do příslušných kartézských souřadnic a pak porovnat hodnoty na obou křivkách.
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