Решите по действиям. 5 4/7 : 26/21 - (5 2/15 * 3/22 + 1 14/15)= 20

1) 5 2/15 * 3/22 = 77/15 * 3/22 = 7/10
2) 7/10 + 1 14/15 = 7/10 + 29/15 = 79/30
3) 5 4/7 : 26/21 = 39/7 * 21/26 = 9/2
4) 9/2 - 79/30 = 56/30 = 1 13/15