Answer:
[tex] \frac{3}{2} a - 13 = 5 \\ \frac{3}{2} a = 5 + 13 \\ \frac{3}{2} a = 18 \\ 3a = 18 \times 2 \\ 3a = 36 \\ a = \frac{36}{3} \\ a = 12[/tex]