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Simplifying 2r + 8 = -1 Reorder the terms: 8 + 2r = -1 Solving 8 + 2r = -1 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 + 2r = -1 + -8 Combine like terms: 8 + -8 = 0 0 + 2r = -1 + -8 2r = -1 + -8 Combine like terms: -1 + -8 = -9 2r = -9 Divide each side by '2'. r = -4.5 Simplifying r = -4.5
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