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Simplifying -2r + -12 = -27 Reorder the terms: -12 + -2r = -27 Solving -12 + -2r = -27 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 + -2r = -27 + 12 Combine like terms: -12 + 12 = 0 0 + -2r = -27 + 12 -2r = -27 + 12 Combine like terms: -27 + 12 = -15 -2r = -15 Divide each side by '-2'. r = 7.5 Simplifying r = 7.5
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