the answer is B.
the reasons is because we move -4 to the other side which makes it +4 and
[tex] \frac{3}{2}x = 16 + 4[/tex]
[tex] \frac{3}{2}x = 20[/tex]
[tex]x = 20 \div \frac{3}{2} [/tex]
[tex]x = 20 \times \frac{2}{3} [/tex]
[tex]x = 40 \div 3[/tex]
[tex]x = 13 \frac{1}{3} [/tex]