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Simplifying x2 + 21 = 5 Reorder the terms: 21 + x2 = 5 Solving 21 + x2 = 5 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 = 5 + -21 Combine like terms: 21 + -21 = 0 0 + x2 = 5 + -21 x2 = 5 + -21 Combine like terms: 5 + -21 = -16 x2 = -16 Simplifying x2 = -16 Reorder the terms: 16 + x2 = -16 + 16 Combine like terms: -16 + 16 = 0 16 + x2 = 0 The solution to this equation could not be determined.
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