Question

{-2x+3y=10
{X+2y=2 resolver o sistema linear ​

Answer 1

Resposta:

$\left \{ {{- 2x + 3y=10} \atop {x + 2y =2}} \right.$

x + 2y = 2

x = 2 - 2y

- 2x + 3y = 10

- 2 . (2 - 2y) + 3y =  10

- 4 + 4y + 3y = 10

7y = 10 + 4

7y = 14

y = 14/7

y = 2

x = 2 - 2y

x = 2 - 2 . 2

x = 2 - 4

x = - 2