While simplifying, you may have made a mistake with signs. Use the distributive property first, and then combine like terms on both sides. The equation will simplify to $\displaystyle{16}+{2}{x}={16}-{3}{x}\usepackage{cmbright}\Huge\$ . This equation has the solution $\displaystyle{x}={0}\usepackage{cmbright}\Huge\$ .