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Simplifying 4r + 2r + 9r + -8 = 0 Reorder the terms: -8 + 4r + 2r + 9r = 0 Combine like terms: 4r + 2r = 6r -8 + 6r + 9r = 0 Combine like terms: 6r + 9r = 15r -8 + 15r = 0 Solving -8 + 15r = 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 + 15r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + 15r = 0 + 8 15r = 0 + 8 Combine like terms: 0 + 8 = 8 15r = 8 Divide each side by '15'. r = 0.5333333333 Simplifying r = 0.5333333333
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