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Simplifying -7x + 9x + -7 = 0 Reorder the terms: -7 + -7x + 9x = 0 Combine like terms: -7x + 9x = 2x -7 + 2x = 0 Solving -7 + 2x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 2x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 2x = 0 + 7 2x = 0 + 7 Combine like terms: 0 + 7 = 7 2x = 7 Divide each side by '2'. x = 3.5 Simplifying x = 3.5
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