13-7r=-4(r+2)

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Solution for 13-7r=-4(r+2) equation: 



13-7r=-4(r+2)

We move all terms to the left:

13-7r-(-4(r+2))=0



We calculate terms in parentheses: -(-4(r+2)), so:

-4(r+2)

We multiply parentheses

-4r-8

Back to the equation:

-(-4r-8)



We get rid of parentheses

-7r+4r+8+13=0

We add all the numbers together, and all the variables

-3r+21=0

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

-3r=-21

r=-21/-3

r=+7

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