Question

a) (2x - 2y = 5
(x+2y = 13
método de sustitución ​

Answer 1

Respuesta:

* 2x - 2y = 5

         2x = 5 + 2y

           x = $\frac{5+2y}{2}$  

* x+2y = 13

Sustituimos para hallar "y"  

    x + 2y = 13

$\frac{5+2y}{2}$ + 2y = 13

  $\frac{5+2y+4y}{2}$ = 13

   5 + 6y = 26

         6y = 21

        | y = $\frac{7}{2}$ |

Reemplazamos para hallar "x"

  x = $\frac{5+2y}{2}$

  x = $\frac{5+2(\frac{7}{2} )}{2}$

  x = $\frac{5+7}{2}$

  x = $\frac{12}{2}$

| x = 6 |