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30/3.14=r
We move all terms to the left:
30/3.14-(r)=0
We add all the numbers together, and all the variables
-1r+30/3.14=0
We multiply all the terms by the denominator
-1r*3.14+30=0
Wy multiply elements
-3.14r+30=0
We move all terms containing r to the left, all other terms to the right
-3.14r=-30
r=-30/-3.14
r=9+1/1.8045977011494
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