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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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