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Simplifying 87.92 = 2r * 3.14 Reorder the terms for easier multiplication: 87.92 = 2 * 3.14r Multiply 2 * 3.14 87.92 = 6.28r Solving 87.92 = 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. 87.92 + -6.28r = 6.28r + -6.28r Combine like terms: 6.28r + -6.28r = 0.00 87.92 + -6.28r = 0.00 Add '-87.92' to each side of the equation. 87.92 + -87.92 + -6.28r = 0.00 + -87.92 Combine like terms: 87.92 + -87.92 = 0.00 0.00 + -6.28r = 0.00 + -87.92 -6.28r = 0.00 + -87.92 Combine like terms: 0.00 + -87.92 = -87.92 -6.28r = -87.92 Divide each side by '-6.28'. r = 14 Simplifying r = 14
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