The slope between 2 points (x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)
so
(y2-y1)/(x2-x1)=-5/7
y2-y1=-5
x2-x1=7
this is easy, if x1=0 and y1=0, then x1=7 and y2=-5
(0,0) and (7,-5) is a possible point
1236.00/3= 412.00
then take 1236.00 - 412.00= 824.00
the tv cost 824.00
the dvd cost 412.00