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Simplifying -7r + -2.3 + 7r + 3.1r + 5 = 0 Reorder the terms: -2.3 + 5 + -7r + 7r + 3.1r = 0 Combine like terms: -2.3 + 5 = 2.7 2.7 + -7r + 7r + 3.1r = 0 Combine like terms: -7r + 7r = 0 2.7 + 0 + 3.1r = 0 2.7 + 3.1r = 0 Solving 2.7 + 3.1r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2.7' to each side of the equation. 2.7 + -2.7 + 3.1r = 0 + -2.7 Combine like terms: 2.7 + -2.7 = 0.0 0.0 + 3.1r = 0 + -2.7 3.1r = 0 + -2.7 Combine like terms: 0 + -2.7 = -2.7 3.1r = -2.7 Divide each side by '3.1'. r = -0.8709677419 Simplifying r = -0.8709677419
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