9x-2=34
9x=36
x=4
3x+31=61
3x=30
x=10
3.4+2x=9.2
2x=5.8
x=2.9
6.9x-4.1=9.1
6.9x=13.2
x=132/69
x=44/23
83-5x=68
5x=15
x=3
7.2-0.2x=6.2
72-2x=62
2x=10
x=5