1) у = 18*7/21 = 126/21 = 6
2) у = 39*10/30 = 390/30 = 13
3) у = 40*7/5 = 280/5 = 56
4) у = 2*39/26=78/26 = 3
1) у = 18*7/21 = 126/21 = 6
2) у = 39*10/30 = 390/30 = 13
3) у = 40*7/5 = 280/5 = 56
4) у = 2*39/26=78/26 = 3