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Simplifying 6r + 2(r + 2) + -5 = 20 Reorder the terms: 6r + 2(2 + r) + -5 = 20 6r + (2 * 2 + r * 2) + -5 = 20 6r + (4 + 2r) + -5 = 20 Reorder the terms: 4 + -5 + 6r + 2r = 20 Combine like terms: 4 + -5 = -1 -1 + 6r + 2r = 20 Combine like terms: 6r + 2r = 8r -1 + 8r = 20 Solving -1 + 8r = 20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 8r = 20 + 1 Combine like terms: -1 + 1 = 0 0 + 8r = 20 + 1 8r = 20 + 1 Combine like terms: 20 + 1 = 21 8r = 21 Divide each side by '8'. r = 2.625 Simplifying r = 2.625
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