Subtract 10 from all parts: $\displaystyle-{6}-{10}<{4}{p}+{10}-{10}<{14}-{10}\usepackage{cmbright}\Huge\$

Simplify: $\displaystyle-{16}<{4}{p}<{4}\usepackage{cmbright}\Huge\$

Divide all parts by 4: $\displaystyle-{4}<{p}<{1}\usepackage{cmbright}\Huge\$