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Simplifying 8r = 12 + 20r Solving 8r = 12 + 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. 8r + -20r = 12 + 20r + -20r Combine like terms: 8r + -20r = -12r -12r = 12 + 20r + -20r Combine like terms: 20r + -20r = 0 -12r = 12 + 0 -12r = 12 Divide each side by '-12'. r = -1 Simplifying r = -1
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