1) 6:4 = 12:8, проверяем: 6*8 = 48 и 4*12 = 48
2) 3:5 = 15:25, проверяем 3*25 = 75 и 5*15 = 75
3) 7:10 = 49:70, проверяем 7*70 = 490 и 10*49 = 490
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1) 6:4 = 12:8, проверяем: 6*8 = 48 и 4*12 = 48
2) 3:5 = 15:25, проверяем 3*25 = 75 и 5*15 = 75
3) 7:10 = 49:70, проверяем 7*70 = 490 и 10*49 = 490