2*3.14159265359*r=31.4

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Solution for 2*3.14159265359*r=31.4 equation: 



2*3.14159265359r=31.4

We move all terms to the left:

2*3.14159265359r-(31.4)=0

We add all the numbers together, and all the variables

2*3.14159265359r-31.4=0

Wy multiply elements

6r-31.4=0

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

6r=31.4

r=31.4/6

r=5+1/4.28571428571

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