Respuesta :

5/8=1/2a+2
5a/8=1/2+2
5/8a=2a+1/2
5/8a−2a=2a+1/2−2a
−11/8a=1/2
(8/−11)*(−11/8a)=(8/−11)*(1/2)
a=−4/11

The answer is -4/11 

Hope this helps :)