Short Answer

Back-Substitution for Warehouse Stock Level Adjustments

An inventory planner for a retail distribution center is balancing stock level adjustments across three different warehouses. The optimal adjustments, represented by variables xx, yy, and zz, are modeled by the following system of linear equations:

{3x4z=12y+3z=22x+3y=6\left\{\begin{array}{l} 3x - 4z = -1 2y + 3z = 2 2x + 3y = 6 \end{array}\right.

Following the specific elimination method presented for this system, once the first variable is solved as x=3x = -3, recall the remaining steps needed to determine the other variables. Specifically, state into which original equation you substitute x=3x = -3 to find the value of yy, what value of yy is obtained, and then into which equation you substitute yy to find the value of zz, along with the final value of zz.

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Updated 2026-06-05

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