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Simplifying 2x + x + -4 = 9 Reorder the terms: -4 + 2x + x = 9 Combine like terms: 2x + x = 3x -4 + 3x = 9 Solving -4 + 3x = 9 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 + 3x = 9 + 4 Combine like terms: -4 + 4 = 0 0 + 3x = 9 + 4 3x = 9 + 4 Combine like terms: 9 + 4 = 13 3x = 13 Divide each side by '3'. x = 4.333333333 Simplifying x = 4.333333333
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