Sistem persamaan linear dua variabel 2x+3y=4 x-4y=8

kita akan menyelesaikan SPLDV tersebut dengan cara Crammer.
perhatikan bahwa
[tex]
\begin{matrix}2x+3y=4\\x-4y=8\end{matrix}\Rightarrow\begin{bmatrix}2&3\\1&-4\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}4\\8\end{bmatrix}
[/tex]
Selanjutnya,
[tex]
x=\frac{\begin{vmatrix}4&3\\8&-4\end{vmatrix}}{\begin{vmatrix}2&3\\1&-4\end{vmatrix}}=\frac{-16-24}{-8-3}=\frac{-40}{-11}=\frac{40}{11}
[/tex]
[tex]
y=\frac{\begin{vmatrix}2&4\\1&8\end{vmatrix}}{\begin{vmatrix}2&3\\1&-4\end{vmatrix}}=\frac{16-4}{-8-3}=-\frac{12}{11}
[/tex]