[-2r-1]=11

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Solution for [-2r-1]=11 equation:


[-2r-1]=11

We simplify the equation to the form, which is simple to understand 
(-2r-1)=11

Remove unnecessary parentheses
-2r-1=11

We move all terms containing r to the left and all other terms to the right. 
-2r=+11+1

We simplify left and right side of the equation. 
-2r=+12

We divide both sides of the equation by -2 to get r. 
r=-6

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