0.99=r-9.9

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Solution for 0.99=r-9.9 equation: 



0.99=r-9.9

We move all terms to the left:

0.99-(r-9.9)=0

We get rid of parentheses

-r+9.9+0.99=0

We add all the numbers together, and all the variables

-1r+10.89=0

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

-r=-10.89

r=-10.89/-1

r=10+0.89/1

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