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Simplifying 117 = r(39) Reorder the terms for easier multiplication: 117 = 39r Solving 117 = 39r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-39r' to each side of the equation. 117 + -39r = 39r + -39r Combine like terms: 39r + -39r = 0 117 + -39r = 0 Add '-117' to each side of the equation. 117 + -117 + -39r = 0 + -117 Combine like terms: 117 + -117 = 0 0 + -39r = 0 + -117 -39r = 0 + -117 Combine like terms: 0 + -117 = -117 -39r = -117 Divide each side by '-39'. r = 3 Simplifying r = 3
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