8=-2(r+-5)

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



8=-2(r+-5)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

-2(r-5)

We multiply parentheses

-2r+10

Back to the equation:

-(-2r+10)



We get rid of parentheses

2r-10+8=0

We add all the numbers together, and all the variables

2r-2=0

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

2r=2

r=2/2

r=1

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