r-1.8=2.2

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Solution for r-1.8=2.2 equation: 



r-1.8=2.2

We move all terms to the left:

r-1.8-(2.2)=0

We add all the numbers together, and all the variables

r-4=0

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

r=4

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