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Simplifying -4 = 20r + -5 Reorder the terms: -4 = -5 + 20r Solving -4 = -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. -4 + -20r = -5 + 20r + -20r Combine like terms: 20r + -20r = 0 -4 + -20r = -5 + 0 -4 + -20r = -5 Add '4' to each side of the equation. -4 + 4 + -20r = -5 + 4 Combine like terms: -4 + 4 = 0 0 + -20r = -5 + 4 -20r = -5 + 4 Combine like terms: -5 + 4 = -1 -20r = -1 Divide each side by '-20'. r = 0.05 Simplifying r = 0.05
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