Question

7x - 4y = 5
9x + 8y = 13
método de determinantes

me ayúdan porfavor​

Answer 1

1.-

$y = \frac{ - 5}{28}$

2.-m

$m = 0.b = \frac{13}{72}$

Answer 2

Respuesta:

x = 1

y = 0.5

Explicación paso a paso:

$x=\frac{\left[\begin{array}{ccc}5&-4\\13&8\end{array}\right] }{\left[\begin{array}{ccc}7&-4\\9&8\end{array}\right] } =\frac{40-(-52)}{56-(-36)}=\frac{92}{92}=1$

$y=\frac{\left[\begin{array}{ccc}7&5\\9&13\end{array}\right] }{\left[\begin{array}{ccc}7&-4\\9&8\end{array}\right] } =\frac{91-45}{56-(-36)}=\frac{46}{92}=\frac{1}{2}=0.5$