8=2r+2

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Solution for 8=2r+2 equation: 



8=2r+2

We move all terms to the left:

8-(2r+2)=0

We get rid of parentheses

-2r-2+8=0

We add all the numbers together, and all the variables

-2r+6=0

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

-2r=-6

r=-6/-2

r=+3

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