3/7-1/4x=5 3/7-4x ......
3/7-1/4х=5 3/7-4х 4х-1/4х=5 3/7-3/7 3 3/4х=5 х=5:3 3/4 х=5:15/4 х=4/3 х=1 1/3
3/7-1/4х=5 3/7-4х -1/4х+4х=5 3/7-3/7 3 3/4х=5 х= 5/ 3 3/4 х= 4/3=1 1/3