1,3r=3,9

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Solution for 1,3r=3,9 equation: 



1.3r=3.9

We move all terms to the left:

1.3r-(3.9)=0

We add all the numbers together, and all the variables

1.3r-3.9=0

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

1.3r=3.9

r=3.9/1.3

r=3+-4.4408920985E-16/1.3

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