9/8-2x=3/4
2x=9/8-6/8
2x=3/8
x=3/16
6x-7/8=1/10
6x=4/40+35/40
6x=39/40
x=13/80
4/9x-1/3x=1
1/9x=1
x=9
11/12+1/6x=4/3
1/6x=16/12-11/12
1/6x=5/12
x=5/2
（2-3/4）x=4/5
5/4x=4/5
x=16/25
4/7x+x=22/49
11/7x=22/49
x=2/7