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Simplifying x4 + 2x3 = 21 + -14x + -4x2 Reorder the terms: 2x3 + x4 = 21 + -14x + -4x2 Solving 2x3 + x4 = 21 + -14x + -4x2 Solving for variable 'x'. Reorder the terms: -21 + 14x + 4x2 + 2x3 + x4 = 21 + -14x + -4x2 + -21 + 14x + 4x2 Reorder the terms: -21 + 14x + 4x2 + 2x3 + x4 = 21 + -21 + -14x + 14x + -4x2 + 4x2 Combine like terms: 21 + -21 = 0 -21 + 14x + 4x2 + 2x3 + x4 = 0 + -14x + 14x + -4x2 + 4x2 -21 + 14x + 4x2 + 2x3 + x4 = -14x + 14x + -4x2 + 4x2 Combine like terms: -14x + 14x = 0 -21 + 14x + 4x2 + 2x3 + x4 = 0 + -4x2 + 4x2 -21 + 14x + 4x2 + 2x3 + x4 = -4x2 + 4x2 Combine like terms: -4x2 + 4x2 = 0 -21 + 14x + 4x2 + 2x3 + x4 = 0 The solution to this equation could not be determined.
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