Incorrect. Let $\displaystyle{t}=\usepackage{cmbright}\Huge\$ the number of orchestra tickets sold and $\displaystyle{b}=\usepackage{cmbright}\Huge\$ the number of balcony tickets sold. Then

$\displaystyle{t}+{b}={980}\usepackage{cmbright}\Huge\$

$\displaystyle{50}{t}+{35}{b}={44},{350}\usepackage{cmbright}\Huge\$

Multiply the first equation by $\displaystyle-{50}\usepackage{cmbright}\Huge\$ and add it to the second equation. Solve for b.