-2(-9)-1=

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Solution for -2(-9)-1= equation:


-2(-9)-1=0

We simplify the equation to the form, which is simple to understand 
-2(-9)-1=0

Reorder the terms in parentheses
+(+18)-1=0

Remove unnecessary parentheses
+18-1=0

We move all terms containing  to the left and all other terms to the right. 
0=0-18+1

We simplify left and right side of the equation. 
0=-17

0=-17

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

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