Correct. Multiply the second equation by 2 to get: $\displaystyle{2}{x}-{10}{y}=-{18}\usepackage{cmbright}\Huge\$

Add this to $\displaystyle-{2}{x}+{7}{y}={6}\usepackage{cmbright}\Huge\$ to get: $\displaystyle-{3}{y}=-{12}\usepackage{cmbright}\Huge\$

Solve for y to get $\displaystyle{y}={4}\usepackage{cmbright}\Huge\$ and substitute this into the second equation:

$\displaystyle{x}-{5}{\left({4}\right)}=-{9}\usepackage{cmbright}\Huge\$ or $\displaystyle{x}-{20}=-{9}\usepackage{cmbright}\Huge\$ , so $\displaystyle{x}={11}\usepackage{cmbright}\Huge\$