Solve the following variable using Cramer's Rule. Reduce fraction, if possible.

Question

-9x + 1y + 6z = -7
5x + 4y - 5z = -1
2x -8y - 2z = 8

Answer 1

Cramer's rule

Given equations are -9x  + y  + 6z  = -7 ---> (1)

5x  + 4y  - 5z  = -1 ---> (2)

2x - 8y  - 2z  = 8 ---> (3)

Write the equations into matrices form AX  = B .

A  is coefficient matrix , X  is variable matrix and B  is constant matrix.

Solution :