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Simplifying 75 = 2(3.14) * r Multiply 2 * 3.14 75 = 6.28r Solving 75 = 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. 75 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 75 + -6.28r = 0.00 Add '-75' to each side of the equation. 75 + -75 + -6.28r = 0.00 + -75 Combine like terms: 75 + -75 = 0 0 + -6.28r = 0.00 + -75 -6.28r = 0.00 + -75 Combine like terms: 0.00 + -75 = -75 -6.28r = -75 Divide each side by '-6.28'. r = 11.94267516 Simplifying r = 11.94267516
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