21.3+r=-17.79

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Solution for 21.3+r=-17.79 equation: 



21.3+r=-17.79

We move all terms to the left:

21.3+r-(-17.79)=0

We add all the numbers together, and all the variables

r+39.09=0

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

r=-39.09

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