83=7r+3(2r-7)

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Solution for 83=7r+3(2r-7) equation: 



83=7r+3(2r-7)

We move all terms to the left:

83-(7r+3(2r-7))=0



We calculate terms in parentheses: -(7r+3(2r-7)), so:

7r+3(2r-7)

We multiply parentheses

7r+6r-21

We add all the numbers together, and all the variables

13r-21

Back to the equation:

-(13r-21)



We get rid of parentheses

-13r+21+83=0

We add all the numbers together, and all the variables

-13r+104=0

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

-13r=-104

r=-104/-13

r=+8

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