Решите примеры пожалуйста по математике

мне лень писать, мейби в дс?

1. Х = 11/35
2. Х= 52/85
3. Х= 12/35
4. Х= 11/21

1. 8 7/72
2. 7/60
3. 13/20
4. 12 69/140
5. 4 34/39

Решаем уравнения:

1) x + 2/7 = 3/5
x = 3/5 - 2/7
x = (21 - 10) / 35
x = 11/35

2) 31/34 - x = 12/40
x = 31/34 - 12/40
x = 31/34 - 3/10
x = (31*5 - 3*17) / 170
x = (155 - 51) / 170
x = 104 / 170
x = 52/85

3) x - 1/5 = 3/21
x = 3/21 + 1/5
x = 1/7 + 1/5
x = (5 + 7) / 35
x = 12/35

4) 6/7 - x = 1/3
x = 6/7 - 1/3
x = (18 - 7) / 21
x = 11/21

Выполняем умножение:

1. 2 3/3 * 2 5/24 = 9/3 * 53/24 = 3 * 53/24 = 53/8 = 6 5/8
2. 2 2/20 * 1 1/18 = 42/20 * 19/18 = 21/10 * 19/18 = 7/10 * 19/6 = 133/60 = 2 13/60
3. 6/16 * 1 11/15 = 6/16 * 26/15 = 3/8 * 26/15 = 1/4 * 13/5 = 13/20 = 0 13/20
4. 3 9/30 * 3 11/14 = 99/30 * 53/14 = 33/10 * 53/14 = 1749/140 = 12 69/140
5. 3 17/26 * 1 8/24 = 95/26 * 32/24 = 95/26 * 4/3 = 95/13 * 2/3 = 190/39 = 4 34/39