Correct. Substitute 3 for x in the function: $\displaystyle{g{{\left({3}\right)}}}={4}{\left({3}\right)}-{7}\usepackage{cmbright}\Huge\$

Simplify the expression: $\displaystyle{g{{\left({3}\right)}}}={12}-{7}={5}\usepackage{cmbright}\Huge\$