11-(-1r)=12

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Solution for 11-(-1r)=12 equation: 



11-(-1r)=12

We move all terms to the left:

11-(-1r)-(12)=0

We add all the numbers together, and all the variables

-(-1r)-1=0

We get rid of parentheses

1r-1=0

We add all the numbers together, and all the variables

r-1=0

We move all terms containing r to the left, all other terms to the right

r=1

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