Решите уравнения 1) 6 целых 3/11 + x = 10 целых

1) 6 3/11 + x = 10 6/7;
х = 10 6/7 - 6 3/11;
х = 76/7 - 69/11;
х = (76 * 11)/(7 * 11) - (69 * 7)/(11 * 7);
х = 836/77 - 483/77;
х = 353/77.
х = 4 45/77.
Проверка:
6 3/11 + 353/77 = 10 6/7;
69/11 + 353/77 = 10 6/7;
(69 * 7)/(11 * 7) + 353/77 = 10 6/7;
483/77 + 353/77 = 10 6/7;
836/77 = 76/7;
76/7 = 76/7. Решение верно.

2) 9 5/36 - x =2 4/9
329/36 - х = 22/9;
х = 329/36 - 22/9;
х = 329/36 - (22 * 4)/(9 * 4);
х = 329/36 - 88/36;
х = 241/36;
х = 6 25/36.
Проверка:
9 5/36 - 6 25/36 = 2 4/9;
8 5/36 + 36/36 - 6 25/36 = 2 4/9;
8 41/36 - 6 25/36 = 2 4/9;
2 16/36 = 2 4/9;
2 4/9 = 2 4/9. Решение правильно.

3) x - 5 17/60 = 7 9/20
х = 5 17/60 + 7 9/20;
х = 317/60 + 149/20;
х = 317/60 + (149 * 3)/(20 * 3);
х = 317/60 + 447/60;
х = 764/60;
х = 12 44/60.
Проверка:
12 44/60 - 5 17/60 = 7 9/20;
7 27/60 = 7 9/20;
7 9/20 = 7 9/20. Решение правильно.