1/3(r+9)=13

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Solution for 1/3(r+9)=13 equation: 



1/3(r+9)=13

We move all terms to the left:

1/3(r+9)-(13)=0



Domain of the equation: 3(r+9)!=0

r∈R



We multiply all the terms by the denominator


-13*3(r+9)+1=0

Wy multiply elements

-39r(r+1=0

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