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Simplifying 3x + -2x(x + -1) = -2x + 7x + -12 Reorder the terms: 3x + -2x(-1 + x) = -2x + 7x + -12 3x + (-1 * -2x + x * -2x) = -2x + 7x + -12 3x + (2x + -2x2) = -2x + 7x + -12 Combine like terms: 3x + 2x = 5x 5x + -2x2 = -2x + 7x + -12 Reorder the terms: 5x + -2x2 = -12 + -2x + 7x Combine like terms: -2x + 7x = 5x 5x + -2x2 = -12 + 5x Add '-5x' to each side of the equation. 5x + -5x + -2x2 = -12 + 5x + -5x Combine like terms: 5x + -5x = 0 0 + -2x2 = -12 + 5x + -5x -2x2 = -12 + 5x + -5x Combine like terms: 5x + -5x = 0 -2x2 = -12 + 0 -2x2 = -12 Solving -2x2 = -12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '-2'. x2 = 6 Simplifying x2 = 6 Take the square root of each side: x = {-2.449489743, 2.449489743}
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