-19.4r+6.63=12.31-18.7r

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Solution for -19.4r+6.63=12.31-18.7r equation: 



-19.4r+6.63=12.31-18.7r

We move all terms to the left:

-19.4r+6.63-(12.31-18.7r)=0

We add all the numbers together, and all the variables

-19.4r-(-18.7r+12.31)+6.63=0

We get rid of parentheses

-19.4r+18.7r-12.31+6.63=0

We add all the numbers together, and all the variables

-0.7r-5.68=0

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

-0.7r=5.68

r=5.68/-0.7

r=-8+0.08/0.7

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