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Simplifying 2(r + -2) = 12 Reorder the terms: 2(-2 + r) = 12 (-2 * 2 + r * 2) = 12 (-4 + 2r) = 12 Solving -4 + 2r = 12 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 2r = 12 + 4 Combine like terms: -4 + 4 = 0 0 + 2r = 12 + 4 2r = 12 + 4 Combine like terms: 12 + 4 = 16 2r = 16 Divide each side by '2'. r = 8 Simplifying r = 8
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