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Simplifying 12x = 7(x + 20) Reorder the terms: 12x = 7(20 + x) 12x = (20 * 7 + x * 7) 12x = (140 + 7x) Solving 12x = 140 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 12x + -7x = 140 + 7x + -7x Combine like terms: 12x + -7x = 5x 5x = 140 + 7x + -7x Combine like terms: 7x + -7x = 0 5x = 140 + 0 5x = 140 Divide each side by '5'. x = 28 Simplifying x = 28
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