1-6.6r+6.8=21.66

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Solution for 1-6.6r+6.8=21.66 equation: 



1-6.6r+6.8=21.66

We move all terms to the left:

1-6.6r+6.8-(21.66)=0

We add all the numbers together, and all the variables

-6.6r-13.86=0

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

-6.6r=13.86

r=13.86/-6.6

r=-2+0.66/6.6

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