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Simplifying 1846.32 = 2 * 3.14 * 49 + 2 * 3.14r * 7 Multiply 2 * 3.14 1846.32 = 6.28 * 49 + 2 * 3.14r * 7 Multiply 6.28 * 49 1846.32 = 307.72 + 2 * 3.14r * 7 Reorder the terms for easier multiplication: 1846.32 = 307.72 + 2 * 3.14 * 7r Multiply 2 * 3.14 1846.32 = 307.72 + 6.28 * 7r Multiply 6.28 * 7 1846.32 = 307.72 + 43.96r Solving 1846.32 = 307.72 + 43.96r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-43.96r' to each side of the equation. 1846.32 + -43.96r = 307.72 + 43.96r + -43.96r Combine like terms: 43.96r + -43.96r = 0.00 1846.32 + -43.96r = 307.72 + 0.00 1846.32 + -43.96r = 307.72 Add '-1846.32' to each side of the equation. 1846.32 + -1846.32 + -43.96r = 307.72 + -1846.32 Combine like terms: 1846.32 + -1846.32 = 0.00 0.00 + -43.96r = 307.72 + -1846.32 -43.96r = 307.72 + -1846.32 Combine like terms: 307.72 + -1846.32 = -1538.6 -43.96r = -1538.6 Divide each side by '-43.96'. r = 35 Simplifying r = 35
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