Question

Use Cramer's Rule to solve (if possible) the system of linear equations.

x1 + 2x2 =8
- x1 + x2 = 1

Required:
Find the coefficient matrix.

Answer 1

x1 = 2

x2 = 3

Explanation:

`x_1=(D_(x1))/(D)\\\\x_2=(D_(x2))/(D)`

Here D is the coefficient matrix.

Hence

`x_1=(6)/(3)\\x_1=2`

&

`x_2=(9)/(3)\\x_2=3`