Fill in the Blank

In a corporate resource planning model, a system of three equations represents weekly production constraints:

{xy+z=22xyz=62x+2y+z=3\begin{cases} x - y + z = 2 \\ 2x - y - z = -6 \\ 2x + 2y + z = -3 \end{cases}

An analyst is testing two proposed resource allocations: Profile A is (2,1,3)(-2, -1, 3) and Profile B is (4,3,4)(-4, -3, 4). Upon substituting the values into the system, the analyst finds that Profile A makes all three equations true. For Profile B, the first equation yields 4(3)+4=3-4 - (-3) + 4 = 3, which is false because 32{}3 \neq 2. Recalling the fundamental rule for verifying solutions, the analyst concludes that the only valid solution to this system is Profile ____.

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Updated 2026-05-25

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