The system equations are
\ Equation (1)
Equation (2)
The matrix equation form is .
When, .
Multiply each side by .
Therefore solution matrix is .
First find the determinant of A = ad bc.
.
Therefore A-1 exists.
\The inverse of A is .
Substitute a = 5, b = 4, c = 4, d = and ad
bc =
.
.
Multiply each side by .
The solution is .
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