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Simplifying (x + -1) * 2 + 7(x + -1) + 12 = 0 Reorder the terms: (-1 + x) * 2 + 7(x + -1) + 12 = 0 Reorder the terms for easier multiplication: 2(-1 + x) + 7(x + -1) + 12 = 0 (-1 * 2 + x * 2) + 7(x + -1) + 12 = 0 (-2 + 2x) + 7(x + -1) + 12 = 0 Reorder the terms: -2 + 2x + 7(-1 + x) + 12 = 0 -2 + 2x + (-1 * 7 + x * 7) + 12 = 0 -2 + 2x + (-7 + 7x) + 12 = 0 Reorder the terms: -2 + -7 + 12 + 2x + 7x = 0 Combine like terms: -2 + -7 = -9 -9 + 12 + 2x + 7x = 0 Combine like terms: -9 + 12 = 3 3 + 2x + 7x = 0 Combine like terms: 2x + 7x = 9x 3 + 9x = 0 Solving 3 + 9x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 9x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 9x = 0 + -3 9x = 0 + -3 Combine like terms: 0 + -3 = -3 9x = -3 Divide each side by '9'. x = -0.3333333333 Simplifying x = -0.3333333333
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