Incorrect. These rational expressions have a common denominator of $\displaystyle{\left({12}+{y}\right)}{\left({6}+{y}\right)}\usepackage{cmbright}\Huge\$ . If you multiply both sides by this common denominator, you find that $\displaystyle{9}{\left({6}+{y}\right)}-{3}{\left({12}+{y}\right)}={0}\usepackage{cmbright}\Huge\$ . Solve this equation for y.