(3целых1/2х-1/4)*8=54
(7/2х-1/4)×8 13/4х×8=26х 26х =54 х=54/26 х=27/13
(3 1/2-1/4)*8=54 3 1/2*8=7/2*7 2/2=7/2*16/2=28 -1/4*8=-1/4*7 4/4=-1/4*32/4=-1 28х-1=54 28х=54+1 28х=55 Х=55:28 Х=55/28=1 27/28