138=-6(1-3r)

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Solution for 138=-6(1-3r) equation: 



138=-6(1-3r)

We move all terms to the left:

138-(-6(1-3r))=0

We add all the numbers together, and all the variables

-(-6(-3r+1))+138=0



We calculate terms in parentheses: -(-6(-3r+1)), so:

-6(-3r+1)

We multiply parentheses

18r-6

Back to the equation:

-(18r-6)



We get rid of parentheses

-18r+6+138=0

We add all the numbers together, and all the variables

-18r+144=0

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

-18r=-144

r=-144/-18

r=+8

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