(13)-(-7)+(-9)=

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Solution for (13)-(-7)+(-9)= equation:


(13)-(-7)+(-9)=0

We simplify the equation to the form, which is simple to understand 
(13)-(-7)+(-9)=0

Remove unnecessary parentheses
13-(-7)+(-9)=0

Remove unnecessary parentheses
13+7+(-9)=0

Remove unnecessary parentheses
+13+7-9=0

We move all terms containing  to the left and all other terms to the right. 
0=0-13-7+9

We simplify left and right side of the equation. 
0=-11

0=-11

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

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