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Simplifying 12x = 4(x + 20) Reorder the terms: 12x = 4(20 + x) 12x = (20 * 4 + x * 4) 12x = (80 + 4x) Solving 12x = 80 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 12x + -4x = 80 + 4x + -4x Combine like terms: 12x + -4x = 8x 8x = 80 + 4x + -4x Combine like terms: 4x + -4x = 0 8x = 80 + 0 8x = 80 Divide each side by '8'. x = 10 Simplifying x = 10
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