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Simplifying 12 + r + 2(r + 1) = 3 Reorder the terms: 12 + r + 2(1 + r) = 3 12 + r + (1 * 2 + r * 2) = 3 12 + r + (2 + 2r) = 3 Reorder the terms: 12 + 2 + r + 2r = 3 Combine like terms: 12 + 2 = 14 14 + r + 2r = 3 Combine like terms: r + 2r = 3r 14 + 3r = 3 Solving 14 + 3r = 3 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 3r = 3 + -14 Combine like terms: 14 + -14 = 0 0 + 3r = 3 + -14 3r = 3 + -14 Combine like terms: 3 + -14 = -11 3r = -11 Divide each side by '3'. r = -3.666666667 Simplifying r = -3.666666667
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