0.6+0.4+(-0.5)+(-0.6)=

Solution for 0.6+0.4+(-0.5)+(-0.6)= equation:

0.6 + 0.4+(-0.5)+(-0.6)=0

We simplify the equation to the form, which is simple to understand 
0.6 + 0.4+(-0.5)+(-0.6)=0

Remove unnecessary parentheses
 + 0.6 + 0.4-0.5+(-0.6+)=0

Remove unnecessary parentheses
 + 0.6 + 0.4-0.5-0.6=0

We move all terms containing  to the left and all other terms to the right. 
0=0-0.6-0.4 + 0.5 + 0.6

We simplify left and right side of the equation. 
0=0.1

0=0.1

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