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Simplifying 4.2r + 8.1 + 1.09r + 6.23 = 0 Reorder the terms: 8.1 + 6.23 + 4.2r + 1.09r = 0 Combine like terms: 8.1 + 6.23 = 14.33 14.33 + 4.2r + 1.09r = 0 Combine like terms: 4.2r + 1.09r = 5.29r 14.33 + 5.29r = 0 Solving 14.33 + 5.29r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14.33' to each side of the equation. 14.33 + -14.33 + 5.29r = 0 + -14.33 Combine like terms: 14.33 + -14.33 = 0.00 0.00 + 5.29r = 0 + -14.33 5.29r = 0 + -14.33 Combine like terms: 0 + -14.33 = -14.33 5.29r = -14.33 Divide each side by '5.29'. r = -2.708884688 Simplifying r = -2.708884688
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