Subtract 12 from both sides of the first inequality to get $\displaystyle{10}{j}>{60}\usepackage{cmbright}\Huge\$ . Then divide by 10 to get $\displaystyle{j}>{6}\usepackage{cmbright}\Huge\$ . Add 8 to both sides of the second inequality to get $\displaystyle{7}{j}\le{28}\usepackage{cmbright}\Huge\$ . Then divide by 7 to get $\displaystyle{j}\le{4}\usepackage{cmbright}\Huge\$ . Since the graphs of $\displaystyle{j}>{6}\usepackage{cmbright}\Huge\$ and $\displaystyle{j}\le{4}\usepackage{cmbright}\Huge\$ have no overlap, there is no solution.