Step-by-step explanation:

6 1/2 ÷ a = 13/4

13/2 ÷ a =13/4

(13/2)/a= 13/4 multiply both sides by to cancel a

13/2= (13/4)(a) divide both sides by 13/4

13/2 ÷ 13/4 = a

13/2 × 4/13 = a

2 = a