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Simplifying 103.9r * 2 + 103.9r + -31.1 = 0 Reorder the terms for easier multiplication: 103.9 * 2r + 103.9r + -31.1 = 0 Multiply 103.9 * 2 207.8r + 103.9r + -31.1 = 0 Reorder the terms: -31.1 + 207.8r + 103.9r = 0 Combine like terms: 207.8r + 103.9r = 311.7r -31.1 + 311.7r = 0 Solving -31.1 + 311.7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '31.1' to each side of the equation. -31.1 + 31.1 + 311.7r = 0 + 31.1 Combine like terms: -31.1 + 31.1 = 0.0 0.0 + 311.7r = 0 + 31.1 311.7r = 0 + 31.1 Combine like terms: 0 + 31.1 = 31.1 311.7r = 31.1 Divide each side by '311.7'. r = 0.09977542509 Simplifying r = 0.09977542509
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