9=3.14(r)

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Solution for 9=3.14(r) equation: 



9=3.14(r)

We move all terms to the left:

9-(3.14(r))=0

We add all the numbers together, and all the variables

-(+3.14r)+9=0

We get rid of parentheses

-3.14r+9=0

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

-3.14r=-9

r=-9/-3.14

r=2+2.72/3.14

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