Note that $\displaystyle-{2}\usepackage{cmbright}\Huge\$ and $\displaystyle-{5}\usepackage{cmbright}\Huge\$ are excluded values. Multiply both sides by the common denominator $\displaystyle{\left({x}+{2}\right)}{\left({x}+{5}\right)}\usepackage{cmbright}\Huge\$ :

$\displaystyle\frac{{{12}{\left({x}+{2}\right)}{\left({x}+{5}\right)}}}{{{x}+{2}}}=\frac{{{9}{\left({x}+{2}\right)}{\left({x}+{5}\right)}}}{{{x}+{5}}}\usepackage{cmbright}\Huge\$

Simplify: $\displaystyle{12}{\left({x}+{5}\right)}={9}{\left({x}+{2}\right)}\usepackage{cmbright}\Huge\$

Distribute: $\displaystyle{12}{x}+{60}={9}{x}+{18}\usepackage{cmbright}\Huge\$

Solve for x: $\displaystyle{12}{x}={9}{x}-{42}\usepackage{cmbright}\Huge\$ , $\displaystyle{3}{x}=-{42}\usepackage{cmbright}\Huge\$ , $\displaystyle{x}=-{14}\usepackage{cmbright}\Huge\$