Question 934099
I will assume you mean thisway:

{{{-(1/2)(a+2)+2=-3}}};
otherwise write your equation accurately.


You want all computable constants on one side and the isolated variable on the other side.


I will give  a sequence of number properties to use, and you should form the steps which correspond.


Additive Inverse of {{{2}}};
Multiplicative Inverse of {{{-1/2}}};
Additive Inverse of {{{2}}}  (again);
Simplify.
DONE.



{{{highlight(a=8)}}}