5/8х-1/4х-1/12х+1/6х=(15/24-6/24-2/24+4/24)х=11/24х
5/7у+1/4у+3/14у+1 3/4=(20/28+7/28+6/28)y+1 3|4=33|28 y+1 3|4=1 5|8 y+1 3|4
3 3/5х+4 10/21+1 1/2х+2 1/2= 3 3/5х+1 1/2х+4 10/21+2 1/2=4(3|5+1|2)х+6(10/21+1/2)=4(6/10+5/10)х+6 (20/42+21/42)=4 11/10х+6 41/42=5 1/10х+ 6 41/42
5 2/3у+8 3/5у+3 3/4+16 5/8= (5 2/3+8 3/5)y+3 3/4+16 5/8=(13 10|15+9|15)y+19 6|8+5|8=13 19|15 y+19 11|8=14 4|15 y+20 3|8