5/12y + 1,3 = 0,53 + 7/8 y
7/8y-5/12y=1.3-0,53 (42/48-20/48)y=0,77 22y/48=0,77 y=0,77/22 *48 y=1,68
7/8y-5/12y=1.3-0,53 ((7*3-5*2)/24)y=0,77 ((21-10)/24)y=0,77 11y/24=0,77 y=0,77*24/11 y=1,68