-8.6+2.2r=-4.2

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Solution for -8.6+2.2r=-4.2 equation: 



-8.6+2.2r=-4.2

We move all terms to the left:

-8.6+2.2r-(-4.2)=0

We add all the numbers together, and all the variables

2.2r-4.4=0

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

2.2r=4.4

r=4.4/2.2

r=2

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