Answer:
Quadrant IV (Quadrant 4)
Step-by-step explanation:
As it is a positive x yet negative y so it has to be in quadrant 4 otherwise known as quadrant IV.
Multiply the second equation by -2 so it would be 4x-14y=6 and the first is equation is also 4x-14y=6
So there is infinitely many solutions
First one is 672 the second one is 1008 the third one is 1344 the last one is 1512