(5-3)+6(6*7)=a

Solution for (5-3)+6(6*7)=a equation:

(5-3)+6(6*7)=a

We simplify the equation to the form, which is simple to understand 
(5-3)+6(6*7)=a

Simplifying:
(5-3)+6*(+42)=a

Simplifying terms in parentheses
(+2)+6*(+42)=a

Remove unnecessary parentheses
+2+6*(+42)=a

Reorder the terms in parentheses
+2+(+252)=a

Remove unnecessary parentheses
+2+252=+a

We move all terms containing a to the left and all other terms to the right. 
-1a=-2-252

We simplify left and right side of the equation. 
-1a=-254

We divide both sides of the equation by -01 to get a. 
a=254