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Simplifying 13r + -2(3r + 6) = 0 Reorder the terms: 13r + -2(6 + 3r) = 0 13r + (6 * -2 + 3r * -2) = 0 13r + (-12 + -6r) = 0 Reorder the terms: -12 + 13r + -6r = 0 Combine like terms: 13r + -6r = 7r -12 + 7r = 0 Solving -12 + 7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 7r = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 7r = 0 + 12 7r = 0 + 12 Combine like terms: 0 + 12 = 12 7r = 12 Divide each side by '7'. r = 1.714285714 Simplifying r = 1.714285714
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