tim x,y biet x.y +2x=3
Tim x ,y biet
x.y-2x+3y=3
Tim x.y biet
X/3=4/y
tim x;y biet x+x.y+y=3
tim x y biet x2-5.y=x.y-4.x+1-
Tim x, y thuoc Z, biet:
x.y+x+y+1=-3
tim x, y thuoc Z biet : x.y - 2.x - 3.y = 5 ( trinh bay nha )
(2x-1)(3y-2)=27 tim x y biet x y thuoc n
Tim x,y biet x.y.(x+y)=456789