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Simplifying 2x + (x + -1) = 8 Reorder the terms: 2x + (-1 + x) = 8 Remove parenthesis around (-1 + x) 2x + -1 + x = 8 Reorder the terms: -1 + 2x + x = 8 Combine like terms: 2x + x = 3x -1 + 3x = 8 Solving -1 + 3x = 8 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + 3x = 8 + 1 Combine like terms: -1 + 1 = 0 0 + 3x = 8 + 1 3x = 8 + 1 Combine like terms: 8 + 1 = 9 3x = 9 Divide each side by '3'. x = 3 Simplifying x = 3
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