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Х:3 1/7=5 2/11:19/21
Х:3 1/7=57/11 :19/21
Х:3 1/7=57/11 *21/19
Х:3 1/7=63/11=5 8/11
Х=63/11*7/22
Ч=1386=5 8/11
Х:3 1/7=5 2/11:19/21
Х:3 1/7=57/11 :19/21
Х:3 1/7=57/11 *21/19
Х:3 1/7=63/11=5 8/11
Х=63/11*7/22
Ч=1386=5 8/11
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