Решите уравнение: 1) 4/15+х11/5; 2) 16/21-х=9/21; 3) х-4/35=12/35

1) 4/15 + х = 11/5
х = 11/5 - 4/15 = (33-4)/15 = 29/15 = 1 14/15
2) 16/21 - х = 9/21
х = 16/21 - 9/21 = 7/21 = 1/3
3) х - 4/35 = 12/35
х = 12/35 + 4/35 = 16/35