-9=-2.2+r

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Solution for -9=-2.2+r equation: 



-9=-2.2+r

We move all terms to the left:

-9-(-2.2+r)=0

We add all the numbers together, and all the variables

-(r-2.2)-9=0

We get rid of parentheses

-r+2.2-9=0

We add all the numbers together, and all the variables

-1r-6.8=0

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

-r=6.8

r=6.8/-1

r=-6+0.8/1

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