13-13r+2+6r-2r-1=3+2.9

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Solution for 13-13r+2+6r-2r-1=3+2.9 equation: 



13-13r+2+6r-2r-1=3+2.9

We move all terms to the left:

13-13r+2+6r-2r-1-(3+2.9)=0

We add all the numbers together, and all the variables

-13r+6r-2r+13+2-1-(5.9)=0

We add all the numbers together, and all the variables

-9r+8.1=0

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

-9r=-8.1

r=-8.1/-9

r=7.3636363636364/8.1818181818182

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