I think you have to email them or something lol
Well first you take 17 and you then take 14 and 19 and you add that all together and you get 50 then you divide 50 in divide that by 3 and you get 16.6
(3x-4y=-24)+4(x+y=-1)
7x=-28
x=-4, which makes x+y=-1 so
y=3
So the solution to the system is the point (-4,3)