31+2r=-(6r-7)

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Solution for 31+2r=-(6r-7) equation: 



31+2r=-(6r-7)

We move all terms to the left:

31+2r-(-(6r-7))=0



We calculate terms in parentheses: -(-(6r-7)), so:

-(6r-7)

We get rid of parentheses

-6r+7

Back to the equation:

-(-6r+7)



We get rid of parentheses

2r+6r-7+31=0

We add all the numbers together, and all the variables

8r+24=0

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

8r=-24

r=-24/8

r=-3

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