Correct. Add 9 to both sides and then divide both sides by 6:

$\displaystyle{6}{y}-{9}+{9}={27}+{9}\usepackage{cmbright}\Huge\$ , so $\displaystyle{6}{y}={36}\usepackage{cmbright}\Huge\$ . Then $\displaystyle\frac{{{6}{y}}}{{6}}=\frac{{36}}{{6}}\usepackage{cmbright}\Huge\$ , so $\displaystyle{y}={6}\usepackage{cmbright}\Huge\$