You may have added 1 as your first step. This will not leave you with $\displaystyle{3}{x}\usepackage{cmbright}\Huge\$ on the left side of the equation. You need to subtract 1 from both sides of the equation to isolate the variable term. Then you may have multiplied by 3. If you have $\displaystyle{3}{x}\usepackage{cmbright}\Huge\$ alone on the left side, you would need to divide both sides by 3 to isolate the variable.