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65/6.28=r
We move all terms to the left:
65/6.28-(r)=0
We add all the numbers together, and all the variables
-1r+65/6.28=0
We multiply all the terms by the denominator
-1r*6.28+65=0
Wy multiply elements
-6.28r+65=0
We move all terms containing r to the left, all other terms to the right
-6.28r=-65
r=-65/-6.28
r=10+1/2.8545454545455
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