1. 15/13; 19/14; 26/21
2. 9/10<1; 31/31=1; 8/9<9/8; 6/5>6/7
3. 12 кг по 30 грн и 8кг по 15
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Answers & Comments
1. 15/13; 19/14; 26/21
2. 9/10<1; 31/31=1; 8/9<9/8; 6/5>6/7
3. 12 кг по 30 грн и 8кг по 15