99=7(r+8)+1

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Solution for 99=7(r+8)+1 equation: 



99=7(r+8)+1

We move all terms to the left:

99-(7(r+8)+1)=0



We calculate terms in parentheses: -(7(r+8)+1), so:

7(r+8)+1

We multiply parentheses

7r+56+1

We add all the numbers together, and all the variables

7r+57

Back to the equation:

-(7r+57)



We get rid of parentheses

-7r-57+99=0

We add all the numbers together, and all the variables

-7r+42=0

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

-7r=-42

r=-42/-7

r=+6

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