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Simplifying 20 + 11r = -20 + 6r + 15 Reorder the terms: 20 + 11r = -20 + 15 + 6r Combine like terms: -20 + 15 = -5 20 + 11r = -5 + 6r Solving 20 + 11r = -5 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 20 + 11r + -6r = -5 + 6r + -6r Combine like terms: 11r + -6r = 5r 20 + 5r = -5 + 6r + -6r Combine like terms: 6r + -6r = 0 20 + 5r = -5 + 0 20 + 5r = -5 Add '-20' to each side of the equation. 20 + -20 + 5r = -5 + -20 Combine like terms: 20 + -20 = 0 0 + 5r = -5 + -20 5r = -5 + -20 Combine like terms: -5 + -20 = -25 5r = -25 Divide each side by '5'. r = -5 Simplifying r = -5
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