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Simplifying 5 = -5r * 4 Reorder the terms for easier multiplication: 5 = -5 * 4r Multiply -5 * 4 5 = -20r Solving 5 = -20r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '20r' to each side of the equation. 5 + 20r = -20r + 20r Combine like terms: -20r + 20r = 0 5 + 20r = 0 Add '-5' to each side of the equation. 5 + -5 + 20r = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 20r = 0 + -5 20r = 0 + -5 Combine like terms: 0 + -5 = -5 20r = -5 Divide each side by '20'. r = -0.25 Simplifying r = -0.25
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