(5 2/9у+3 1/3)*3-7 2/3 если у=3 1/8

(5 2/9у+3 1/3)*3-7 2/3 = 15 6/9y+10-7 2/3 = 15 6/9y+2 1/31) при y = 3 1/8, то 15 6/9*3 1/8+2 1/3 = 48 23/24+2 8/24 = 51 7/24