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Simplifying 13 + 7r = 0 Solving 13 + 7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 7r = 0 + -13 Combine like terms: 13 + -13 = 0 0 + 7r = 0 + -13 7r = 0 + -13 Combine like terms: 0 + -13 = -13 7r = -13 Divide each side by '7'. r = -1.857142857 Simplifying r = -1.857142857
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