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Simplifying 2x + 5x + -6 = 15 Reorder the terms: -6 + 2x + 5x = 15 Combine like terms: 2x + 5x = 7x -6 + 7x = 15 Solving -6 + 7x = 15 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 + 7x = 15 + 6 Combine like terms: -6 + 6 = 0 0 + 7x = 15 + 6 7x = 15 + 6 Combine like terms: 15 + 6 = 21 7x = 21 Divide each side by '7'. x = 3 Simplifying x = 3
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