Решите нормально 2 уравнения: 1) 2/3:7/9=у:7/8. (2) 3 1/3:к=1 1/3: 2. Пунктов 55!!!!!
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2/3*9/7= у*8/7
18/21 = у*8/7
у=18/21 * 7/8
у= 3/4=0,75
2) 3 1/3 :к = 1 1/3 :2
10/3 : к= 4/3 * 1/2
10/3 : к = 2/3
к= 10/3 : 2/3
к=10/3*3/2
к= 5