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Simplifying 0 = 2 * 3.14r Multiply 2 * 3.14 0 = 6.28r Solving 0 = 6.28r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6.28r' to each side of the equation. 0 + -6.28r = 6.28r + -6.28r Remove the zero: -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 -6.28r = 0.00 Divide each side by '-6.28'. r = 0 Simplifying r = 0
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