2 целых11/15+х=5 целых2/15 х-2 целых5/16=4 целых13/16

1) 2 11/15 + х = 5 2/15;

х = 5 2/15 - 2 11/15;

х = 5 - 2 + 2/15 - 11/15;

х = 3 + (2 - 11) / 15;

х = 3 - 9/15;

х = 3 - (3 * 3) / (3 * 5);

х = 3 - 3/5;

х = 2 + 1 - 3/5;

х = 2 + 5/5 - 3/5;

х = 2 + (5 - 3) / 5;

х = 2 + 2/5;

х = 2 2/5.

Ответ: х = 2 2/5.

2) х - 2 5/16 = 4 13/16;

х = 4 13/16 + 2 5/16;

х = 4 + 2 + 13/16 + 5/16;

х = 6 + (13 + 5) / 16;

х = 6 + 18/16;

х = 6 + 1 + (18 - 1 * 16) / 16;

х = 6 + 1 + (18 - 16) / 16;

х = 6 + 1 + 2/16;

х = 7 + 2/16;

х = 7 + 2 / (2 * 8);

х = 7 + 1/8;

х = 7 1/8.

Ответ: х = 7 1/8.