(3-4)-(5-8)=-(+12)-6+1

Solution for (3-4)-(5-8)=-(+12)-6+1 equation:

(3-4)-(5-8)=-(+12)-6+1

We simplify the equation to the form, which is simple to understand 
(3-4)-(5-8)=-(+12)-6+1

Simplifying terms in parentheses
(-1)-(5-8)=-(+12)-6+1

Simplifying terms in parentheses
(-1)-(-3)=-(+12)-6+1

Remove unnecessary parentheses
-1-(-3)=-(+12)-6+1

Remove unnecessary parentheses
-1+3=-(+12)-6+1

Remove unnecessary parentheses
-1+3=-12-6+1

We move all terms containing  to the left and all other terms to the right. 
0=-12-6+1+1-3

We simplify left and right side of the equation. 
0=-19

0=-19

The left and right sides are not equal, therefore there is no solution. This equation is invalid.