-87=3+6(1-2r)

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Solution for -87=3+6(1-2r) equation: 



-87=3+6(1-2r)

We move all terms to the left:

-87-(3+6(1-2r))=0

We add all the numbers together, and all the variables

-(3+6(-2r+1))-87=0



We calculate terms in parentheses: -(3+6(-2r+1)), so:

3+6(-2r+1)

determiningTheFunctionDomain
6(-2r+1)+3

We multiply parentheses

-12r+6+3

We add all the numbers together, and all the variables

-12r+9

Back to the equation:

-(-12r+9)



We get rid of parentheses

12r-9-87=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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