Question

2x-xy-y=5

Tim x,y 

Giup minh vs ak

Answer 1

\(x\left(2-y\right)-y+2-2=5\)

\(\left(2-y\right)\left(x+1\right)=7\)

⇒ (x+1) và (2-y) ϵ {-1;1;-7;7}

⇒ (x;y) ϵ {(-2;5);(0;-5);(-8;3);(6;1)}