SOLUTION: using cramers rule solve the following systems of linear equations
a. x-2y+3z = -7
2y = 6
2x-z = 5
b. 3x - y + 2z = 13
-x + 4y + 2z= -1
4y
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Question 1123039: using cramers rule solve the following systems of linear equations
a. x-2y+3z = -7
2y = 6
2x-z = 5
b. 3x - y + 2z = 13
-x + 4y + 2z= -1
4y + 3z = 4
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
a.
Your matrix:
Write down the main matrix and find its determinant:
Δ =
Replace the 1st column of the main matrix with the solution vector and find its determinant:
Δ
Replace the 2nd column of the main matrix with the solution vector and find its determinant:
Δ
Replace the 3rd column of the main matrix with the solution vector and find its determinant:
Δ
= Δ /Δ =
= Δ /Δ =
= Δ/Δ =
Solution set:
b.
Your matrix
Write down the main matrix and find its determinant:
Δ =
Replace the 1st column of the main matrix with the solution vector and find its determinant:
Δ
Replace the 2nd column of the main matrix with the solution vector and find its determinant:
Δ
Replace the 3rd column of the main matrix with the solution vector and find its determinant:
Δ
= Δ / Δ =
= Δ / Δ =
= Δ / Δ =
Solution set:
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