Problema Solution
the cost of eight cds and fifteen dvds is 186.31 and the cost of nine dvds and thirteen cds is 167.09 How much do a cd and dvd cost
Answer provided by our tutors
cd = x dvd = y
8x + 15y = 186.31
13x + 9y = 167.09
solving
cd=x = $6.74
dvd = y = $8.82