Question 145751
xy+6=0
x-y=-5 then x=y-5

then using the 1st eq we have (y-5)y+6=0 then y^2-5y+6=0

solving this eq solutions are 3 and 2 so y=2 or y=3

if y=2 then x=-3
if y=3 then x=-2

Solutions are (-3,2) and (-2,3)