Hei! :)
[tex]1.\ x+\frac{1}{3} =\frac{1}{2} \\6x=3-2\\6x=1 => x=\frac{1}{6} \\\\2.\ \frac{x+1}{3} =\frac{1}{2} \\2x+2=3\\2x=1\\x=\frac{1}{2}[/tex]