Correct. If $\displaystyle{j}=\usepackage{cmbright}\Huge\$ Jimmy's age, then $\displaystyle{2}{j}=\usepackage{cmbright}\Huge\$ his sister's age, and $\displaystyle{j}+{5}=\usepackage{cmbright}\Huge\$ his brother's age. The sum of these is 29, so $\displaystyle{j}+{2}{j}+{j}+{5}={29}\usepackage{cmbright}\Huge\$ . This simplifies to $\displaystyle{4}{j}+{5}={29}\usepackage{cmbright}\Huge\$ . Subtract 5 from both sides: $\displaystyle{4}{j}={24}\usepackage{cmbright}\Huge\$ . Divide both sides by 4: $\displaystyle{j}={6}\usepackage{cmbright}\Huge\$ . His brother is 5 years older, or 11 years old.