Add 1 to both sides of the inequality: $\displaystyle{2}{x}-{1}+{1}\ge{5}+{1}\usepackage{cmbright}\Huge\$ or $\displaystyle{2}{x}\ge{6}\usepackage{cmbright}\Huge\$

Divide both sides by 2: $\displaystyle\frac{{{2}{x}}}{{2}}\geq\frac{{6}}{{2}}\usepackage{cmbright}\Huge\$ or $\displaystyle{x}\geq{3}\usepackage{cmbright}\Huge\$