13-(-9)=

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Solution for 13-(-9)= equation:


13-(-9) =0

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

Remove unnecessary parentheses
13+9=0

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

We simplify left and right side of the equation. 
0=-22

0=-22

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

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