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Simplifying -5r + -12 = 9 + -8 Reorder the terms: -12 + -5r = 9 + -8 Combine like terms: 9 + -8 = 1 -12 + -5r = 1 Solving -12 + -5r = 1 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 + -5r = 1 + 12 Combine like terms: -12 + 12 = 0 0 + -5r = 1 + 12 -5r = 1 + 12 Combine like terms: 1 + 12 = 13 -5r = 13 Divide each side by '-5'. r = -2.6 Simplifying r = -2.6
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