Rewrite $\displaystyle{2}{x}\usepackage{cmbright}\Huge\$ as $\displaystyle-{5}{x}+{7}{x}\usepackage{cmbright}\Huge\$ , as $\displaystyle{\left(-{5}\right)}{\left({7}\right)}=-{35}\usepackage{cmbright}\Huge\$ , and $\displaystyle-{5}+{7}={2}\usepackage{cmbright}\Huge\$ . Then factor by grouping to get:

$\displaystyle{\left({x}-{5}\right)}{\left({x}+{7}\right)}={0}\usepackage{cmbright}\Huge\$

$\displaystyle{x}-{5}={0}\usepackage{cmbright}\Huge\$ or $\displaystyle{x}+{7}={0}\usepackage{cmbright}\Huge\$

$\displaystyle{x}={5}\usepackage{cmbright}\Huge\$ or $\displaystyle{x}=-{7}\usepackage{cmbright}\Huge\$