Question 981892


The pair  (x,y) = (3,1)  gives   x - y = 3-1 = 2.


The pair  (x,y) = (0,-4)  gives   x - y = 0-(-4) = 4.


The pair  (x,y) = (-4,0)  gives   x - y = -4-0 = -4.


The pair  (x,y) = (-3,-7)  gives   x - y = -3-(-7) = 7-3 = 4.


<B>Answer</B>. &nbsp;Two pairs &nbsp;(x,y) = (0,-4)&nbsp; and &nbsp;(x,y) = (-3,-7)&nbsp; give &nbsp;&nbsp;x - y = 4.