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Simplifying 12x + 21 = -17 + 102 Reorder the terms: 21 + 12x = -17 + 102 Combine like terms: -17 + 102 = 85 21 + 12x = 85 Solving 21 + 12x = 85 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 12x = 85 + -21 Combine like terms: 21 + -21 = 0 0 + 12x = 85 + -21 12x = 85 + -21 Combine like terms: 85 + -21 = 64 12x = 64 Divide each side by '12'. x = 5.333333333 Simplifying x = 5.333333333
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