2pi*r=12

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Solution for 2pi*r=12 equation: 


Simplifying
2pi * r = 12

Multiply ip * r
2ipr = 12

Solving
2ipr = 12

Solving for variable 'i'.

Move all terms containing i to the left, all other terms to the right.

Divide each side by '2pr'.
i = 6p-1r-1

Simplifying
i = 6p-1r-1

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