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Simplifying 20 = -5r Solving 20 = -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. 20 + 5r = -5r + 5r Combine like terms: -5r + 5r = 0 20 + 5r = 0 Add '-20' to each side of the equation. 20 + -20 + 5r = 0 + -20 Combine like terms: 20 + -20 = 0 0 + 5r = 0 + -20 5r = 0 + -20 Combine like terms: 0 + -20 = -20 5r = -20 Divide each side by '5'. r = -4 Simplifying r = -4
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