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Simplifying -5r + 2(r + 2) + -5 = -20 Reorder the terms: -5r + 2(2 + r) + -5 = -20 -5r + (2 * 2 + r * 2) + -5 = -20 -5r + (4 + 2r) + -5 = -20 Reorder the terms: 4 + -5 + -5r + 2r = -20 Combine like terms: 4 + -5 = -1 -1 + -5r + 2r = -20 Combine like terms: -5r + 2r = -3r -1 + -3r = -20 Solving -1 + -3r = -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 + -3r = -20 + 1 Combine like terms: -1 + 1 = 0 0 + -3r = -20 + 1 -3r = -20 + 1 Combine like terms: -20 + 1 = -19 -3r = -19 Divide each side by '-3'. r = 6.333333333 Simplifying r = 6.333333333
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