Ответ:
Х:2 5/7=10:5/21
Х:2 5/7=42
Х=42*2 5/7
Х=114
48:5 1/3=х:4 1/3
9=х:4 1/3
Х=9:4 1/3=2 1/13
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Ответ:
Х:2 5/7=10:5/21
Х:2 5/7=42
Х=42*2 5/7
Х=114
48:5 1/3=х:4 1/3
9=х:4 1/3
Х=9:4 1/3=2 1/13