Question

5x - y = 4
2x - y = 5

Answer 1

Resposta:

mult.(-1) (2° LINHA)

5x- y=4

-2x +y= -5

3X = - 1

X= - 1/3

5X- Y=4

5(-1/3)- Y =4

-5/3- Y=4

-Y=4 +5/3

- Y= 17/3 (-1)

Y= - 17/3

S={- 1/3; - 17/3}