Incorrect. Substitute $\displaystyle{\left({x}+{1}\right)}\usepackage{cmbright}\Huge\$ for y in the top equation and solve the new equation: $\displaystyle{x}+{2}{\left({x}+{1}\right)}={17}\usepackage{cmbright}\Huge\$ for x. Don't forget to distribute the 2. Use that x value in either equation to solve for y.