Question 909591
Assuming the question -4= {{{(a+5)/-3}}} 
Get ride of the pesky fraction by multiplying each side by -3
12 = A + 5
Subtract 5 from each side
7 = A<br>
Check:
-4={{{(7+5)/-3}}}
-4 = {{{12/-3}}}
-4 = -4