To solve an equation like this, we simply need to isolate the variable and simplify. We can do this by performing the reverse operations on both sides of the equation, so that it does not change the value of the equation but rather the form it is written.
a+5=-5a+5
+5a +5a
6a+5=5
-5 -5
6a=0
/6 /6
a=0
Therefore, in this equation, a=0.