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Simplifying x2 + -1x + -4 = x2 + 4 Reorder the terms: -4 + -1x + x2 = x2 + 4 Reorder the terms: -4 + -1x + x2 = 4 + x2 Add '-1x2' to each side of the equation. -4 + -1x + x2 + -1x2 = 4 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4 + -1x + 0 = 4 + x2 + -1x2 -4 + -1x = 4 + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4 + -1x = 4 + 0 -4 + -1x = 4 Solving -4 + -1x = 4 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 + -1x = 4 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 4 + 4 -1x = 4 + 4 Combine like terms: 4 + 4 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8
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