15-2r+11r=-3(6+r)

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Solution for 15-2r+11r=-3(6+r) equation: 



15-2r+11r=-3(6+r)

We move all terms to the left:

15-2r+11r-(-3(6+r))=0

We add all the numbers together, and all the variables

-2r+11r-(-3(r+6))+15=0

We add all the numbers together, and all the variables

9r-(-3(r+6))+15=0



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

-3(r+6)

We multiply parentheses

-3r-18

Back to the equation:

-(-3r-18)



We get rid of parentheses

9r+3r+18+15=0

We add all the numbers together, and all the variables

12r+33=0

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

12r=-33

r=-33/12

r=-2+3/4

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