Answer :

[tex]3x-1=8-3x \\\\ 3x+3x=8+1 \\\\ 6x=9 \\\\ \boxed{x=\frac{9}{6}=\frac{3}{2}}[/tex]
[tex]3x-1=8-3x\\ 6x=9\\ x=\frac{9}{6}=\frac{3}{2}[/tex]