19.8=2.2r

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Solution for 19.8=2.2r equation: 



19.8=2.2r

We move all terms to the left:

19.8-(2.2r)=0

We add all the numbers together, and all the variables

-(+2.2r)+19.8=0

We get rid of parentheses

-2.2r+19.8=0

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

-2.2r=-19.8

r=-19.8/-2.2

r=+9

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