Sr Examen
mx+y=7; x+ny=9
Solución
Respuesta rápida
$$m_{1} = - \frac{y - 7}{x}$$
=
$$\frac{7 - y}{x}$$
=
$$n_{1} = - \frac{x - 9}{y}$$
=
$$\frac{9 - x}{y}$$
=
=
$$\frac{7 - y}{x}$$
=
-(-7 + y)/x
$$n_{1} = - \frac{x - 9}{y}$$
=
$$\frac{9 - x}{y}$$
=
-(-9 + x)/y