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Simplifying -1(X + -1) = 2(X + 7) Reorder the terms: -1(-1 + X) = 2(X + 7) (-1 * -1 + X * -1) = 2(X + 7) (1 + -1X) = 2(X + 7) Reorder the terms: 1 + -1X = 2(7 + X) 1 + -1X = (7 * 2 + X * 2) 1 + -1X = (14 + 2X) Solving 1 + -1X = 14 + 2X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2X' to each side of the equation. 1 + -1X + -2X = 14 + 2X + -2X Combine like terms: -1X + -2X = -3X 1 + -3X = 14 + 2X + -2X Combine like terms: 2X + -2X = 0 1 + -3X = 14 + 0 1 + -3X = 14 Add '-1' to each side of the equation. 1 + -1 + -3X = 14 + -1 Combine like terms: 1 + -1 = 0 0 + -3X = 14 + -1 -3X = 14 + -1 Combine like terms: 14 + -1 = 13 -3X = 13 Divide each side by '-3'. X = -4.333333333 Simplifying X = -4.333333333
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