i need help with matrices and systems of equations. x+ 2y - z = -7 2x +3y + 2z = -3 x-2y-2z=3

Question

x+ 2y - z = -7
2x +3y + 2z = -3
x-2y-2z=3

Answer 1

Cramer's rule

Given equations x  + 2y  - z  = - 7 ---> (1)

2x  + 3y  + 2z  = - 3 ---> (2)

x  - 2y  - 2z  = 3 ---> (3)

Write the equations in matrices form AX  = B .

A  is coefficeint mattrix , X  is variable matrix and B  is constant matrix.

Solution :