19=1+2r

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Solution for 19=1+2r equation: 



19=1+2r

We move all terms to the left:

19-(1+2r)=0

We add all the numbers together, and all the variables

-(2r+1)+19=0

We get rid of parentheses

-2r-1+19=0

We add all the numbers together, and all the variables

-2r+18=0

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

-2r=-18

r=-18/-2

r=+9

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