Упростите выражение 1) 5/8х-1/4х-1/12х+1/6х ; 2)5/7y+1/4y+3/14у+1 3/4 ; 3)3 3/5х+4 10/21+1

1) 5/8х - 1/4х - 1/12х + 1/6х = x (5/8 - 1/4 - 1/12 + 1/6) = x ((5 * 3)/24 - (1 * 6)/24 - 2/24 + 4/24) = x (15/24 - 6/24 - 2/24 + 4/24) = x (15 - 6 - 2 + 4)/24 = 11/24x.

2) 5/7y + 1/4y + 3/14у + 1 3/4 = y (5/7 + 1/4 + 3/14) + 1 3/4 = y ((5 * 4)/28 + 7/28 + (3 * 2)/28) + 1 3/4 = y (20/28 + 7/28 + 6/28) + 1 3/4 = y (20 + 7 + 6)/28 + 1 3/4 = 33/28y + 1 3/4 = 1 5/28y + 1 3/4.

3) 3 3/5х + 4 10/21 + 1 1/2х + 2 1/3 = x (3 3/5 + 1 1/2) + 4 10/21 + 2 1/3 = x((3 * 5 + 3)/5 + (1 * 2 + 1)/2) + (4 * 21 + 10)/21 + (2 * 3 + 1)/3 = x (18/5 + 3/2) + 94/21 + 7/3 = x ((18 * 2)/10 + (3 * 5)/10) + 94/21 + (7 * 7)/21 = x (36/10 + 15/10) + 94/21 + 49/21 = x (36 + 15)/10 + (94 + 49)/21 = 51/10x + 143/21 = 5.1x + 6 17/21.

4) 5 2/3у + 8 3/5у + 3 3/4 + 16 5/8 = y ((5 * 3 + 2)/3 + (8 * 5 + 3)/5) + (3 * 4 + 3)/4 + (16 * 8 + 5)/8 = y (17/3 + 43/5) + 15/4 + 133/8 = y ((17 * 5)/15 + (43 * 3)/15) + (15 * 2)/8 + 133/8 =  y (85/15 + 129/15) + 30/8 + 133/8 = y (85 + 129)/15 + (30 + 133)/8 = 214/15y + 163/8 = 14 4/15y + 20.375.