Respuesta:
Explicación paso a paso:
3x+y=16; y=x+4
3x+y=16, -x+y=4
[tex]\left\lbrace\begin{array}{rcl}3x+y&=&16\\\\-x+y&=&4\end{array}\right.
\\\\det=\left|\begin{matrix}3&1\\\\-1&1\end{matrix}\right|=(3)(1)-[(-1)(1)]=3-[-1]=3+1=4[/tex]
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Respuesta:
Explicación paso a paso:
3x+y=16; y=x+4
3x+y=16, -x+y=4
[tex]\left\lbrace\begin{array}{rcl}3x+y&=&16\\\\-x+y&=&4\end{array}\right.
\\\\det=\left|\begin{matrix}3&1\\\\-1&1\end{matrix}\right|=(3)(1)-[(-1)(1)]=3-[-1]=3+1=4[/tex]