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Simplifying 3(4x + 7) = 9 Reorder the terms: 3(7 + 4x) = 9 (7 * 3 + 4x * 3) = 9 (21 + 12x) = 9 Solving 21 + 12x = 9 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 = 9 + -21 Combine like terms: 21 + -21 = 0 0 + 12x = 9 + -21 12x = 9 + -21 Combine like terms: 9 + -21 = -12 12x = -12 Divide each side by '12'. x = -1 Simplifying x = -1
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