cramer's rule by using calculator

#mathematics #algebra
To solve system of 3 equations using Cramer's rule, you need ( 4 matrices ) but on the calculator you can write only ( 3 matrices A , B , C )
So, The question is how to use ( 4 matrices ) on the calculator ?
.
we overcome this obstacle by using (Answer Matrix ) to be the fourth matrix

[@mathcinema3549]

To solve system of 3 equations using Cramer's rule, you need ( 4 matrices ) but on the calculator you can write only ( 3 matrices A , B , C ) So, The question is how to use ( 4 matrices ) on the calculator ? . we overcome this obstacle by using (Answer Matrix ) to be the fourth matrix