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How To Solve 3 Variables Linear Equation System By Using The Cramer's Rule

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If A . X = C is a system of linear equations consisting of n linear equations and n unknowns so that det(A) ≠ 0, then the sisterm of the equation has a unit solving. The settlement can be solved by using the formula:

The Formula of How to Solve 3 Variables Linear Equation System by Using The Cramer's Rule

Where Aj is the matrix obtained by substituting the entries in the jth column of the entries in the matrix.

Example:
Determine the settlement of the equation below by using the cramer's rule!

Answer:
The matrix system multiplication form of the equation is:

From this form obtained:

Therefore,

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Referensi :
  • To'Ali's book math group accounting and sales

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