-40+8r=-(r+4)

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Solution for -40+8r=-(r+4) equation: 



-40+8r=-(r+4)

We move all terms to the left:

-40+8r-(-(r+4))=0



We calculate terms in parentheses: -(-(r+4)), so:

-(r+4)

We get rid of parentheses

-r-4

We add all the numbers together, and all the variables

-1r-4

Back to the equation:

-(-1r-4)



We get rid of parentheses

8r+1r+4-40=0

We add all the numbers together, and all the variables

9r-36=0

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

9r=36

r=36/9

r=4

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