To solve the first inequality, subtract 5 from both sides and then divide by $\displaystyle-{3}\usepackage{cmbright}\Huge\$ . This will reverse the inequality sign and give you $\displaystyle{b}<-{1}\usepackage{cmbright}\Huge\$ . To solve the second inequality, add 4 to both sides to get $\displaystyle{b}\ge{4}\usepackage{cmbright}\Huge\$ . The solution is all values of b less than $\displaystyle-{1}\usepackage{cmbright}\Huge\$ or greater than or equal to 4.