Answer:
The given system of
equations can be expressed as
AX = B,
where
and 
= 11 
Therefore A is
non-singular matrix so A?1 exists and given system has a unique solution.
A11 =
(?1)1+1.4 = 4;
A12 =
(?1)1+2.3 = ?3;
A21 =
(?1)2+1(? 1) = 1;
A22 =
(?1)2+2 .2 = 2;
Adj 
Now AX = B 
On equating, we
get 
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