-8=-4+r

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Solution for -8=-4+r equation: 



-8=-4+r

We move all terms to the left:

-8-(-4+r)=0

We add all the numbers together, and all the variables

-(r-4)-8=0

We get rid of parentheses

-r+4-8=0

We add all the numbers together, and all the variables

-1r-4=0

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

-r=4

r=4/-1

r=-4

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