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Simplifying -6r + 2(r + 5) + -5 = -20 Reorder the terms: -6r + 2(5 + r) + -5 = -20 -6r + (5 * 2 + r * 2) + -5 = -20 -6r + (10 + 2r) + -5 = -20 Reorder the terms: 10 + -5 + -6r + 2r = -20 Combine like terms: 10 + -5 = 5 5 + -6r + 2r = -20 Combine like terms: -6r + 2r = -4r 5 + -4r = -20 Solving 5 + -4r = -20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -4r = -20 + -5 Combine like terms: 5 + -5 = 0 0 + -4r = -20 + -5 -4r = -20 + -5 Combine like terms: -20 + -5 = -25 -4r = -25 Divide each side by '-4'. r = 6.25 Simplifying r = 6.25
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