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Simplifying 3x2 + 21 = 15 Reorder the terms: 21 + 3x2 = 15 Solving 21 + 3x2 = 15 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 + 3x2 = 15 + -21 Combine like terms: 21 + -21 = 0 0 + 3x2 = 15 + -21 3x2 = 15 + -21 Combine like terms: 15 + -21 = -6 3x2 = -6 Divide each side by '3'. x2 = -2 Simplifying x2 = -2 Reorder the terms: 2 + x2 = -2 + 2 Combine like terms: -2 + 2 = 0 2 + x2 = 0 The solution to this equation could not be determined.
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