-13-r=-2(2+5r)

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Solution for -13-r=-2(2+5r) equation: 



-13-r=-2(2+5r)

We move all terms to the left:

-13-r-(-2(2+5r))=0

We add all the numbers together, and all the variables

-r-(-2(5r+2))-13=0

We add all the numbers together, and all the variables

-1r-(-2(5r+2))-13=0



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

-2(5r+2)

We multiply parentheses

-10r-4

Back to the equation:

-(-10r-4)



We get rid of parentheses

-1r+10r+4-13=0

We add all the numbers together, and all the variables

9r-9=0

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

9r=9

r=9/9

r=1

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