Question

Sistemas 5×-y=4{2×-y=-5

Answer 1

Olá

5x-y=4. (Corte os y)
2x-y= -5

7x= -1
X= -1/7

Espero ter ajudado

Answer 2

{5x - y = 4 (-1)

{2x - y = - 5

{- 5x + y = - 4

{2x - y = - 5

- 3x = - 9

x= - 9/-3

x= 3

5x - y = 4

5 • 3 - y = 4

15 - y = 4

- y = 4 - 15

- y = - 11 (-1)

y = 11

S= (3 , 11)