19=11-2r

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Solution for 19=11-2r equation: 



19=11-2r

We move all terms to the left:

19-(11-2r)=0

We add all the numbers together, and all the variables

-(-2r+11)+19=0

We get rid of parentheses

2r-11+19=0

We add all the numbers together, and all the variables

2r+8=0

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

2r=-8

r=-8/2

r=-4

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