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Simplifying 20 = 2(3.14r) Remove parenthesis around (3.14r) 20 = 2 * 3.14r Multiply 2 * 3.14 20 = 6.28r Solving 20 = 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. 20 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 20 + -6.28r = 0.00 Add '-20' to each side of the equation. 20 + -20 + -6.28r = 0.00 + -20 Combine like terms: 20 + -20 = 0 0 + -6.28r = 0.00 + -20 -6.28r = 0.00 + -20 Combine like terms: 0.00 + -20 = -20 -6.28r = -20 Divide each side by '-6.28'. r = 3.184713376 Simplifying r = 3.184713376
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