Пошаговое объяснение:
20/х = 190/114
х * 190 = 20 * 114
190х = 2280
х = 2280 : 190
х = 12
13 : х = 17 : 8
х * 17 = 13 * 8
17х = 104
х = 104 : 17
х = 104/17
х = 6 2/17
12,3/6 = 7х/4,2
6 * 7х = 12,3 * 4,2
42х = 51,66
х = 51,66 : 42
х = 1,23
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Пошаговое объяснение:
20/х = 190/114
х * 190 = 20 * 114
190х = 2280
х = 2280 : 190
х = 12
13 : х = 17 : 8
х * 17 = 13 * 8
17х = 104
х = 104 : 17
х = 104/17
х = 6 2/17
12,3/6 = 7х/4,2
6 * 7х = 12,3 * 4,2
42х = 51,66
х = 51,66 : 42
х = 1,23
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