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Simplifying X + -1(2X + -1(3X + -4)) = 11 Reorder the terms: X + -1(2X + -1(-4 + 3X)) = 11 X + -1(2X + (-4 * -1 + 3X * -1)) = 11 X + -1(2X + (4 + -3X)) = 11 Reorder the terms: X + -1(4 + 2X + -3X) = 11 Combine like terms: 2X + -3X = -1X X + -1(4 + -1X) = 11 X + (4 * -1 + -1X * -1) = 11 X + (-4 + 1X) = 11 Reorder the terms: -4 + X + 1X = 11 Combine like terms: X + 1X = 2X -4 + 2X = 11 Solving -4 + 2X = 11 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 2X = 11 + 4 Combine like terms: -4 + 4 = 0 0 + 2X = 11 + 4 2X = 11 + 4 Combine like terms: 11 + 4 = 15 2X = 15 Divide each side by '2'. X = 7.5 Simplifying X = 7.5
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