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Simplifying 2r + -12 = -15 Reorder the terms: -12 + 2r = -15 Solving -12 + 2r = -15 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 = -15 + 12 Combine like terms: -12 + 12 = 0 0 + 2r = -15 + 12 2r = -15 + 12 Combine like terms: -15 + 12 = -3 2r = -3 Divide each side by '2'. r = -1.5 Simplifying r = -1.5
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