7=(2r+8)

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Solution for 7=(2r+8) equation: 



7=(2r+8)

We move all terms to the left:

7-((2r+8))=0



We calculate terms in parentheses: -((2r+8)), so:

(2r+8)

We get rid of parentheses

2r+8

Back to the equation:

-(2r+8)



We get rid of parentheses

-2r-8+7=0

We add all the numbers together, and all the variables

-2r-1=0

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

-2r=1

r=1/-2

r=-1/2

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