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Simplifying -7r + 3(8r + 3) = -127 Reorder the terms: -7r + 3(3 + 8r) = -127 -7r + (3 * 3 + 8r * 3) = -127 -7r + (9 + 24r) = -127 Reorder the terms: 9 + -7r + 24r = -127 Combine like terms: -7r + 24r = 17r 9 + 17r = -127 Solving 9 + 17r = -127 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 17r = -127 + -9 Combine like terms: 9 + -9 = 0 0 + 17r = -127 + -9 17r = -127 + -9 Combine like terms: -127 + -9 = -136 17r = -136 Divide each side by '17'. r = -8 Simplifying r = -8
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