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Simplifying -7x + 12x + 42 = 0 Reorder the terms: 42 + -7x + 12x = 0 Combine like terms: -7x + 12x = 5x 42 + 5x = 0 Solving 42 + 5x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 5x = 0 + -42 Combine like terms: 42 + -42 = 0 0 + 5x = 0 + -42 5x = 0 + -42 Combine like terms: 0 + -42 = -42 5x = -42 Divide each side by '5'. x = -8.4 Simplifying x = -8.4
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