z-1-z-2-a-z-2-z-3-b-z-3-z-4-c-z-1-z-4-d-solve-using-gaussian-elimination-

Question Number 192187 by alcohol last updated on 10/May/23

{\begin{cases} z_{1} + z_{2} = a \\ z_{2} + z_{3} = b \\ z_{3} + z_{4} = c \\ z_{1} + z_{4} = d \end{cases}

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