Raymond B. answered 3d
Math, microeconomics or criminal justice
for example if (x,y) = (0,1), (1,0) or (-1,0) then
1st ordered pair leads to 6<-7 so it's not a solution
2nd ordered pair leads to 7<-2, also not true and not a solution
3rd ordered pair leads to -7 <-7 again not true and not a solution (but close to a solution, very close)