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Simplifying 13 + 4(6r + -9) = 0 Reorder the terms: 13 + 4(-9 + 6r) = 0 13 + (-9 * 4 + 6r * 4) = 0 13 + (-36 + 24r) = 0 Combine like terms: 13 + -36 = -23 -23 + 24r = 0 Solving -23 + 24r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '23' to each side of the equation. -23 + 23 + 24r = 0 + 23 Combine like terms: -23 + 23 = 0 0 + 24r = 0 + 23 24r = 0 + 23 Combine like terms: 0 + 23 = 23 24r = 23 Divide each side by '24'. r = 0.9583333333 Simplifying r = 0.9583333333
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