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Simplifying 5x2 + 21 = 3 + -1x2 Reorder the terms: 21 + 5x2 = 3 + -1x2 Solving 21 + 5x2 = 3 + -1x2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x2' to each side of the equation. 21 + 5x2 + x2 = 3 + -1x2 + x2 Combine like terms: 5x2 + x2 = 6x2 21 + 6x2 = 3 + -1x2 + x2 Combine like terms: -1x2 + x2 = 0 21 + 6x2 = 3 + 0 21 + 6x2 = 3 Add '-21' to each side of the equation. 21 + -21 + 6x2 = 3 + -21 Combine like terms: 21 + -21 = 0 0 + 6x2 = 3 + -21 6x2 = 3 + -21 Combine like terms: 3 + -21 = -18 6x2 = -18 Divide each side by '6'. x2 = -3 Simplifying x2 = -3 Reorder the terms: 3 + x2 = -3 + 3 Combine like terms: -3 + 3 = 0 3 + x2 = 0 The solution to this equation could not be determined.
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