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Simplifying 18.84 = 3.14 * 2r Multiply 3.14 * 2 18.84 = 6.28r Solving 18.84 = 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. 18.84 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 18.84 + -6.28r = 0.00 Add '-18.84' to each side of the equation. 18.84 + -18.84 + -6.28r = 0.00 + -18.84 Combine like terms: 18.84 + -18.84 = 0.00 0.00 + -6.28r = 0.00 + -18.84 -6.28r = 0.00 + -18.84 Combine like terms: 0.00 + -18.84 = -18.84 -6.28r = -18.84 Divide each side by '-6.28'. r = 3 Simplifying r = 3
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