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Simplifying 12(r + 5) + 18 = -54 Reorder the terms: 12(5 + r) + 18 = -54 (5 * 12 + r * 12) + 18 = -54 (60 + 12r) + 18 = -54 Reorder the terms: 60 + 18 + 12r = -54 Combine like terms: 60 + 18 = 78 78 + 12r = -54 Solving 78 + 12r = -54 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-78' to each side of the equation. 78 + -78 + 12r = -54 + -78 Combine like terms: 78 + -78 = 0 0 + 12r = -54 + -78 12r = -54 + -78 Combine like terms: -54 + -78 = -132 12r = -132 Divide each side by '12'. r = -11 Simplifying r = -11
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