Huff Frazier
03/07/2023 · Elementary School
\( \left. \begin{array} { l } { x + y + z = 4 } \\ { x y y - r z = - 11 } \\ { r x + 4 y - y z = - 1 } \end{array} \right. \)
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ابتدا \( z \) را از معادله اول به دست میآوریم و سپس آن را در معادلههای دوم و سوم جایگزین میکنیم. بعد از سادهسازی، دو معادله باقی میماند که میتوانیم با روشهای مختلفی مانند جایگزینی یا حذف آنها را حل کنیم تا مقادیر \( x \)، \( y \) و \( z \) را به دست آوریم.
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