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Simplifying 3r + -8 + -9r = 0 Reorder the terms: -8 + 3r + -9r = 0 Combine like terms: 3r + -9r = -6r -8 + -6r = 0 Solving -8 + -6r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -6r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -6r = 0 + 8 -6r = 0 + 8 Combine like terms: 0 + 8 = 8 -6r = 8 Divide each side by '-6'. r = -1.333333333 Simplifying r = -1.333333333
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