-1+(-9)+7=

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Solution for -1+(-9)+7= equation:


-1+(-9)+7=0

We simplify the equation to the form, which is simple to understand 
-1+(-9)+7=0

Remove unnecessary parentheses
-1-9+7=0

We move all terms containing  to the left and all other terms to the right. 
0=0+1+9-7

We simplify left and right side of the equation. 
0=+3

0=3

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

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