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Simplifying 530.66 = 3.14 * 2r Multiply 3.14 * 2 530.66 = 6.28r Solving 530.66 = 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. 530.66 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 530.66 + -6.28r = 0.00 Add '-530.66' to each side of the equation. 530.66 + -530.66 + -6.28r = 0.00 + -530.66 Combine like terms: 530.66 + -530.66 = 0.00 0.00 + -6.28r = 0.00 + -530.66 -6.28r = 0.00 + -530.66 Combine like terms: 0.00 + -530.66 = -530.66 -6.28r = -530.66 Divide each side by '-6.28'. r = 84.5 Simplifying r = 84.5
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