(1) 4x-1/8=3/4
4x=3/4+1/8=7/8
x=7/32
(2) 5又5/12-x=3又1/4
65/12-13/4=x
x=(65-39)/12
x=26/12=13/6
x=2又1/6
(3) 2x-1又3/7=6又7/4
2x=31/4+10/7
2x=(217+40)/28=257/28
x=257/56
x=4又33/56