1) 4/5 * 3а/2 * 1/3 = 2а/15
3а/4 * 4/5 * 1/3 = а/5
2) 15/8 * 2х/3 * 4/15 = 2х/6 = х/3
14у/5 * 10/21 * 33/10 = 22у/5 = 4 2у/5
3) 1/2 * 2с/3 * 6 = 2с
9 * 2/10 * 5z/9 = z
1) 8 * 5/8 + 8 * 3а/8 = 5+3а
18 * 7с/9 - 18 * 11/18 = 14с - 11
2) 6а/21 + 1/3 * 3/4 = 2а/7 + 1/4 = (8а+7)/28
9/2х - 9/2 * 3/5 = 9/2х - 27/10 = 45х/10 - 27/10 = (45х-27)/10
3) 75t/6 - 105s/18 + 1/2
7х/3 + 5у/12 - 7/4