8=-3+r

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Solution for 8=-3+r equation: 



8=-3+r

We move all terms to the left:

8-(-3+r)=0

We add all the numbers together, and all the variables

-(r-3)+8=0

We get rid of parentheses

-r+3+8=0

We add all the numbers together, and all the variables

-1r+11=0

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

-r=-11

r=-11/-1

r=+11

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