(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