12=r+-1(34+-2)

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Solution for 12=r+-1(34+-2) equation: 



12=r+-1(34+-2)

We move all terms to the left:

12-(r+-1(34+-2))=0

We add all the numbers together, and all the variables

-(r+-132)+12=0

We use the square of the difference formula

-(r-132)+12=0

We get rid of parentheses

-r+132+12=0

We add all the numbers together, and all the variables

-1r+144=0

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

-r=-144

r=-144/-1

r=+144

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