Question

x+xy+y=12 tim x;y

Answer 1

x+xy+y=12

(x+1)(y+1)+1=12

(x+1)(y+1)=11

TH1: x+1=1  ;  y+1=11

Suy ra x=0;y=10

TH2: x+1=11  ;  y+1=1

Suy ra x=10;y=0

Vậy(x;y)=(0;10);(10:0)

Answer 2

x=0;y=6

x=6;y=0