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Simplifying 2(r + 2) + -8 = 8 Reorder the terms: 2(2 + r) + -8 = 8 (2 * 2 + r * 2) + -8 = 8 (4 + 2r) + -8 = 8 Reorder the terms: 4 + -8 + 2r = 8 Combine like terms: 4 + -8 = -4 -4 + 2r = 8 Solving -4 + 2r = 8 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 = 8 + 4 Combine like terms: -4 + 4 = 0 0 + 2r = 8 + 4 2r = 8 + 4 Combine like terms: 8 + 4 = 12 2r = 12 Divide each side by '2'. r = 6 Simplifying r = 6
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