a fost răspuns

Rezolvati in Z: 

xy+ 11= 2(x+3y)

Răspuns :

xy+ 11= 2(x+3y)
xy+11=2x+6y
xy-2x-6y+11=0,
 xy-2x-6y+12-1=0
x(y-2)-6(y-2)-1=0
(y-2)(x-6)=1  rezulta
y-2=1, y=3
x-6=1, x=7
sau
y-2=-1, y=1
x-6=-1, x=5

Bobo10tmask
xy+ 11= 2(x+3y)
xy+11=2x+6y
xy-2x-6y+11=0,
 xy-2x-6y+12-1=0
x(y-2)-6(y-2)-1=0
(y-2)(x-6)=1  rezulta
y-2=1, y=3
x-6=1, x=7
sau
y-2=-1, y=1
x-6=-1, x=5

Nu cred ca mai are vreun rost si rasp eu :))