a x + b y + c z = d 2
2
2
2
a x + b y + c z = d 3
3
3
3
Where x, y, z are the three variables.
We can determine the values of x, y, and z using Cramer’s rule as
and
Similarly,
and
and
The determinants expressed as ∆, ∆ , ∆ , and ∆ are to be evaluated so as to
c
a
b
find x, y, and z.