Question

resolver ecuaciones con dos variables

1. 5x+3y=315
2x+5y=261



2. 5x-y=3
-(5x-2y)=1


por favor ​

Answer 1

Respuesta:

Explicación paso a paso:

5x+3y=315

2x+5y=261

$\left \{ {x = 63 - \frac{3}{5}y } \atop {2x + 5y = 261}} \right.$

$2 ( 63 - \frac{3}{5}y) + 5y = 261$

$y = \frac{675}{19}$

$x = 63 - \frac{3}{5} X \frac{675}{19}$

$x = \frac{792}{19}$

(x,y) = $(\frac{792}{19}, \frac{675}{19})$