Question

va rooog dau coroana

Answer 1

(2x-1)(x-y)=2019

Cazul 1:
2x-1=2019 => x=1010
x-y=1 => y=1009

Cazul 2:
2x-1=1 => x=1
x-y=2019 => y=-2018

Cazul 3:
2x-1=3 => x=2
x-y=673 => y=-671

Cazul 4:
2x-1=673 => x=337
x-y=3 => y=334

=> sol: (x,y) ∈ {(1010,1009),(1,-2018),(2,-671),(337,334)}