-8*(6+3)+390/6=

Solution for -8*(6+3)+390/6= equation:

-8*(6+3)+390/6=0

We simplify the equation to the form, which is simple to understand 
-8*(6+3)+390/6=0

Simplifying:
-8*(6+3)+65=0

Simplifying terms in parentheses
-8*(+9)+65=0

Reorder the terms in parentheses
+(-72)+65=0

Remove unnecessary parentheses
-72+65=0

We move all terms containing  to the left and all other terms to the right. 
0=0+72-65

We simplify left and right side of the equation. 
0=+7

0=7

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