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Simplifying 36 * 2r + 1 = 0 Multiply 36 * 2 72r + 1 = 0 Reorder the terms: 1 + 72r = 0 Solving 1 + 72r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 72r = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 72r = 0 + -1 72r = 0 + -1 Combine like terms: 0 + -1 = -1 72r = -1 Divide each side by '72'. r = -0.01388888889 Simplifying r = -0.01388888889
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