133=7(1-3r)

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Solution for 133=7(1-3r) equation: 



133=7(1-3r)

We move all terms to the left:

133-(7(1-3r))=0

We add all the numbers together, and all the variables

-(7(-3r+1))+133=0



We calculate terms in parentheses: -(7(-3r+1)), so:

7(-3r+1)

We multiply parentheses

-21r+7

Back to the equation:

-(-21r+7)



We get rid of parentheses

21r-7+133=0

We add all the numbers together, and all the variables

21r+126=0

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

21r=-126

r=-126/21

r=-6

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