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Simplifying 1.8r + 9 = -5.7r Reorder the terms: 9 + 1.8r = -5.7r Solving 9 + 1.8r = -5.7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5.7r' to each side of the equation. 9 + 1.8r + 5.7r = -5.7r + 5.7r Combine like terms: 1.8r + 5.7r = 7.5r 9 + 7.5r = -5.7r + 5.7r Combine like terms: -5.7r + 5.7r = 0.0 9 + 7.5r = 0.0 Add '-9' to each side of the equation. 9 + -9 + 7.5r = 0.0 + -9 Combine like terms: 9 + -9 = 0 0 + 7.5r = 0.0 + -9 7.5r = 0.0 + -9 Combine like terms: 0.0 + -9 = -9 7.5r = -9 Divide each side by '7.5'. r = -1.2 Simplifying r = -1.2

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