You may have thought that an absolute value could not be a fraction. This equation is asking for numbers that are $\displaystyle\frac{{2}}{{3}}\usepackage{cmbright}\Huge\$ unit distance from 0. There are two such numbers: $\displaystyle{x}=\frac{{2}}{{3}}\usepackage{cmbright}\Huge\$ and $\displaystyle{x}=-\frac{{2}}{{3}}\usepackage{cmbright}\Huge\$ .