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Simplifying 9 = 21 + 3x2 Solving 9 = 21 + 3x2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x2' to each side of the equation. 9 + -3x2 = 21 + 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 9 + -3x2 = 21 + 0 9 + -3x2 = 21 Add '-9' to each side of the equation. 9 + -9 + -3x2 = 21 + -9 Combine like terms: 9 + -9 = 0 0 + -3x2 = 21 + -9 -3x2 = 21 + -9 Combine like terms: 21 + -9 = 12 -3x2 = 12 Divide each side by '-3'. x2 = -4 Simplifying x2 = -4 Reorder the terms: 4 + x2 = -4 + 4 Combine like terms: -4 + 4 = 0 4 + x2 = 0 The solution to this equation could not be determined.
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