Correct. If $\displaystyle{y}+{4}=-{2}{\left({x}-{5}\right)},\usepackage{cmbright}\Huge\$ then $\displaystyle{y}+{4}=-{2}{x}+{10},\usepackage{cmbright}\Huge\$ so $\displaystyle{y}-{6}=-{2}{x},\usepackage{cmbright}\Huge\$ and therefore $\displaystyle-{6}=-{2}{x}-{y}.\usepackage{cmbright}\Huge\$ This is equivalent to the equation $\displaystyle{2}{x}+{y}={6}.\usepackage{cmbright}\Huge\$