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Simplifying -6t + 2(r + 2) + -5 = -20 Reorder the terms: -6t + 2(2 + r) + -5 = -20 -6t + (2 * 2 + r * 2) + -5 = -20 -6t + (4 + 2r) + -5 = -20 Reorder the terms: 4 + -5 + 2r + -6t = -20 Combine like terms: 4 + -5 = -1 -1 + 2r + -6t = -20 Solving -1 + 2r + -6t = -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 + 2r + 1 + -6t = -20 + 1 Reorder the terms: -1 + 1 + 2r + -6t = -20 + 1 Combine like terms: -1 + 1 = 0 0 + 2r + -6t = -20 + 1 2r + -6t = -20 + 1 Combine like terms: -20 + 1 = -19 2r + -6t = -19 Add '6t' to each side of the equation. 2r + -6t + 6t = -19 + 6t Combine like terms: -6t + 6t = 0 2r + 0 = -19 + 6t 2r = -19 + 6t Divide each side by '2'. r = -9.5 + 3t Simplifying r = -9.5 + 3t
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