9-(-4)=-1

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Solution for 9-(-4)=-1 equation:


9-(-4)=-1

We simplify the equation to the form, which is simple to understand 
9-(-4)=-1

Remove unnecessary parentheses
9+4=-1

We move all terms containing  to the left and all other terms to the right. 
0=-1-9-4

We simplify left and right side of the equation. 
0=-14

0=-14

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

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