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Simplifying -6r + -5(-7 + -8r) = 239 -6r + (-7 * -5 + -8r * -5) = 239 -6r + (35 + 40r) = 239 Reorder the terms: 35 + -6r + 40r = 239 Combine like terms: -6r + 40r = 34r 35 + 34r = 239 Solving 35 + 34r = 239 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + 34r = 239 + -35 Combine like terms: 35 + -35 = 0 0 + 34r = 239 + -35 34r = 239 + -35 Combine like terms: 239 + -35 = 204 34r = 204 Divide each side by '34'. r = 6 Simplifying r = 6
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