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Simplifying x2 + 21 = -4 Reorder the terms: 21 + x2 = -4 Solving 21 + x2 = -4 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + x2 = -4 + -21 Combine like terms: 21 + -21 = 0 0 + x2 = -4 + -21 x2 = -4 + -21 Combine like terms: -4 + -21 = -25 x2 = -25 Simplifying x2 = -25 Reorder the terms: 25 + x2 = -25 + 25 Combine like terms: -25 + 25 = 0 25 + x2 = 0 The solution to this equation could not be determined.
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