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Simplifying 2458.2432 = 2 * 3.14 * 17.64 + 2 * 3.14r * 4.2 Multiply 2 * 3.14 2458.2432 = 6.28 * 17.64 + 2 * 3.14r * 4.2 Multiply 6.28 * 17.64 2458.2432 = 110.7792 + 2 * 3.14r * 4.2 Reorder the terms for easier multiplication: 2458.2432 = 110.7792 + 2 * 3.14 * 4.2r Multiply 2 * 3.14 2458.2432 = 110.7792 + 6.28 * 4.2r Multiply 6.28 * 4.2 2458.2432 = 110.7792 + 26.376r Solving 2458.2432 = 110.7792 + 26.376r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-26.376r' to each side of the equation. 2458.2432 + -26.376r = 110.7792 + 26.376r + -26.376r Combine like terms: 26.376r + -26.376r = 0.000 2458.2432 + -26.376r = 110.7792 + 0.000 2458.2432 + -26.376r = 110.7792 Add '-2458.2432' to each side of the equation. 2458.2432 + -2458.2432 + -26.376r = 110.7792 + -2458.2432 Combine like terms: 2458.2432 + -2458.2432 = 0.0000 0.0000 + -26.376r = 110.7792 + -2458.2432 -26.376r = 110.7792 + -2458.2432 Combine like terms: 110.7792 + -2458.2432 = -2347.464 -26.376r = -2347.464 Divide each side by '-26.376'. r = 89 Simplifying r = 89
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