Question

{5x-4y=0 {x+1/2-y-1/4=3/2

Answer 1

{5x-4y=0

{x+1/2-y-1/4=3/2

= x - y = 3/2 -1/2 + 1/4

= x - y = 2/2 + 1/4

= x - y = 1 + 1/4

= x - y = 4/4 + 1/4

= x - y = 5/4

{5x-4y=0

{x - y = 5/4  . (-4)

{5x-4y=0

{-4x 4y = -20/4  . (-4)

______________________

x = -20/4

x = -5

5x - 4y = 0

5 . (-5) - 4y = 0

-25 - 4y = 0

-4y = 25

y = 25/-4

y = -25/4

Resposta: X vale - 5; Y bale -25/4