2.89-2.7r-0.8r=-1.31

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Solution for 2.89-2.7r-0.8r=-1.31 equation: 



2.89-2.7r-0.8r=-1.31

We move all terms to the left:

2.89-2.7r-0.8r-(-1.31)=0

We add all the numbers together, and all the variables

-3.5r+4.2=0

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

-3.5r=-4.2

r=-4.2/-3.5

r=1+0.7/3.5

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