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Simplifying 12(x + 42) + 7x = 0 Reorder the terms: 12(42 + x) + 7x = 0 (42 * 12 + x * 12) + 7x = 0 (504 + 12x) + 7x = 0 Combine like terms: 12x + 7x = 19x 504 + 19x = 0 Solving 504 + 19x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-504' to each side of the equation. 504 + -504 + 19x = 0 + -504 Combine like terms: 504 + -504 = 0 0 + 19x = 0 + -504 19x = 0 + -504 Combine like terms: 0 + -504 = -504 19x = -504 Divide each side by '19'. x = -26.52631579 Simplifying x = -26.52631579

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