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Simplifying xy + yz + xz = 21 Reorder the terms: xy + xz + yz = 21 Solving xy + xz + yz = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1yz' to each side of the equation. xy + xz + yz + -1yz = 21 + -1yz Combine like terms: yz + -1yz = 0 xy + xz + 0 = 21 + -1yz xy + xz = 21 + -1yz Reorder the terms: -21 + xy + xz + yz = 21 + -1yz + -21 + yz Reorder the terms: -21 + xy + xz + yz = 21 + -21 + -1yz + yz Combine like terms: 21 + -21 = 0 -21 + xy + xz + yz = 0 + -1yz + yz -21 + xy + xz + yz = -1yz + yz Combine like terms: -1yz + yz = 0 -21 + xy + xz + yz = 0 The solution to this equation could not be determined.
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