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Simplifying -2x + 9x + -4 = 0 Reorder the terms: -4 + -2x + 9x = 0 Combine like terms: -2x + 9x = 7x -4 + 7x = 0 Solving -4 + 7x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 7x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 7x = 0 + 4 7x = 0 + 4 Combine like terms: 0 + 4 = 4 7x = 4 Divide each side by '7'. x = 0.5714285714 Simplifying x = 0.5714285714
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