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Simplifying x2 + 4x + -1x + -4 = x2 + 2x Reorder the terms: -4 + 4x + -1x + x2 = x2 + 2x Combine like terms: 4x + -1x = 3x -4 + 3x + x2 = x2 + 2x Reorder the terms: -4 + 3x + x2 = 2x + x2 Add '-1x2' to each side of the equation. -4 + 3x + x2 + -1x2 = 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4 + 3x + 0 = 2x + x2 + -1x2 -4 + 3x = 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4 + 3x = 2x + 0 -4 + 3x = 2x Solving -4 + 3x = 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. -4 + 3x + -2x = 2x + -2x Combine like terms: 3x + -2x = 1x -4 + 1x = 2x + -2x Combine like terms: 2x + -2x = 0 -4 + 1x = 0 Add '4' to each side of the equation. -4 + 4 + 1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 1x = 0 + 4 1x = 0 + 4 Combine like terms: 0 + 4 = 4 1x = 4 Divide each side by '1'. x = 4 Simplifying x = 4
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