3 2/5:х= 6 4/5:1 1/3; 4 2/5:х=8 4/5:2 1/2

№1

3 2/5 : х = 6 4/5 : 1 1/3;

17/5 : х = 34/5 : 4/3;

х = 17/5 * 4/3 : 34/5;

х = 68/15 : 34/5;

х = 68/15 * 5/34;

х = 2/3 * 1/1 = 2/3.

Проверка:

3 2/5 : 2/3 = 6 4/5 : 1 1/3;

17/5 : 2/3 = 34/5 : 4/3;

17/5 * 3/2 = 34/5 * 3/4;

51/10 = 102/20;

51/10 = 51/10.

Ответ: х = 2/3.

№2

4 2/5 : х = 8 4/5 : 2 1/2;

22/5 : х = 44/5 : 5/2;

х = 22/5 * 5/2 : 44/5;

х = 11 : 44/5;

х = 11 * 5/44;

х = 5/4 = 1 1/4.

Проверка:

4 2/5 : 1 1/4 = 8 4/5 : 2 1/2;

22/5 : 5/4 = 44/5 : 5/2;

22/5 * 4/5 = 44/5 * 2/5;

88/25 = 88/25.

Ответ: х = 5/4 = 1 1/4.