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Simplifying 2x + 3x + -6 = -21 Reorder the terms: -6 + 2x + 3x = -21 Combine like terms: 2x + 3x = 5x -6 + 5x = -21 Solving -6 + 5x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + 5x = -21 + 6 Combine like terms: -6 + 6 = 0 0 + 5x = -21 + 6 5x = -21 + 6 Combine like terms: -21 + 6 = -15 5x = -15 Divide each side by '5'. x = -3 Simplifying x = -3
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