8=r/2-(-5)

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Solution for 8=r/2-(-5) equation: 



8=r/2-(-5)

We move all terms to the left:

8-(r/2-(-5))=0

We multiply all the terms by the denominator


-(r+8*2-(-5))=0



We calculate terms in parentheses: -(r+8*2-(-5)), so:

r+8*2-(-5)

We add all the numbers together, and all the variables

r+21

Back to the equation:

-(r+21)



We get rid of parentheses

-r-21=0

We add all the numbers together, and all the variables

-1r-21=0

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

-r=21

r=21/-1

r=-21

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