-100=4(3r-1)

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Solution for -100=4(3r-1) equation: 



-100=4(3r-1)

We move all terms to the left:

-100-(4(3r-1))=0



We calculate terms in parentheses: -(4(3r-1)), so:

4(3r-1)

We multiply parentheses

12r-4

Back to the equation:

-(12r-4)



We get rid of parentheses

-12r+4-100=0

We add all the numbers together, and all the variables

-12r-96=0

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

-12r=96

r=96/-12

r=-8

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