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Simplifying 4(3x + 3) = 84 Reorder the terms: 4(3 + 3x) = 84 (3 * 4 + 3x * 4) = 84 (12 + 12x) = 84 Solving 12 + 12x = 84 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 12x = 84 + -12 Combine like terms: 12 + -12 = 0 0 + 12x = 84 + -12 12x = 84 + -12 Combine like terms: 84 + -12 = 72 12x = 72 Divide each side by '12'. x = 6 Simplifying x = 6
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