-12+(-4+9)=

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Solution for -12+(-4+9)= equation:


-12+(-4+9)=0

We simplify the equation to the form, which is simple to understand 
-12+(-4+9)=0

Simplifying terms in parentheses
-12+(+5)=0

Remove unnecessary parentheses
-12+5=0

We move all terms containing  to the left and all other terms to the right. 
0=0+12-5

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.

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