Correct. If she travels 80 miles in one day, then she will travel $\displaystyle{80}{x}\usepackage{cmbright}\Huge\$ miles in x days. This will leave her with $\displaystyle{y}={3},{280}-{80}{x}\usepackage{cmbright}\Huge\$ miles to travel after x days. Therefore, after 25 days the number of miles left to travel will be $\displaystyle{y}={3},{280}-{80}{\left({25}\right)}={3},{280}-{2},{000}={1},{280}\usepackage{cmbright}\Huge\$ miles.