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Simplifying 8.7(2.3 + 4.6r) = 0 (2.3 * 8.7 + 4.6r * 8.7) = 0 (20.01 + 40.02r) = 0 Solving 20.01 + 40.02r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-20.01' to each side of the equation. 20.01 + -20.01 + 40.02r = 0 + -20.01 Combine like terms: 20.01 + -20.01 = 0.00 0.00 + 40.02r = 0 + -20.01 40.02r = 0 + -20.01 Combine like terms: 0 + -20.01 = -20.01 40.02r = -20.01 Divide each side by '40.02'. r = -0.5 Simplifying r = -0.5
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