20=-7+5(r+6)

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Solution for 20=-7+5(r+6) equation: 



20=-7+5(r+6)

We move all terms to the left:

20-(-7+5(r+6))=0



We calculate terms in parentheses: -(-7+5(r+6)), so:

-7+5(r+6)

determiningTheFunctionDomain
5(r+6)-7

We multiply parentheses

5r+30-7

We add all the numbers together, and all the variables

5r+23

Back to the equation:

-(5r+23)



We get rid of parentheses

-5r-23+20=0

We add all the numbers together, and all the variables

-5r-3=0

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

-5r=3

r=3/-5

r=-3/5

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