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Simplifying 2x + -1(x + 1) = 12 Reorder the terms: 2x + -1(1 + x) = 12 2x + (1 * -1 + x * -1) = 12 2x + (-1 + -1x) = 12 Reorder the terms: -1 + 2x + -1x = 12 Combine like terms: 2x + -1x = 1x -1 + 1x = 12 Solving -1 + 1x = 12 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 + 1x = 12 + 1 Combine like terms: -1 + 1 = 0 0 + 1x = 12 + 1 1x = 12 + 1 Combine like terms: 12 + 1 = 13 1x = 13 Divide each side by '1'. x = 13 Simplifying x = 13
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