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Simplifying 125 = 2(3.14) * r Multiply 2 * 3.14 125 = 6.28r Solving 125 = 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. 125 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 125 + -6.28r = 0.00 Add '-125' to each side of the equation. 125 + -125 + -6.28r = 0.00 + -125 Combine like terms: 125 + -125 = 0 0 + -6.28r = 0.00 + -125 -6.28r = 0.00 + -125 Combine like terms: 0.00 + -125 = -125 -6.28r = -125 Divide each side by '-6.28'. r = 19.9044586 Simplifying r = 19.9044586
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