Compact discs are on sale at Listen More to Music. John paid $45.00 for 3 CDs. Let "x" represent the price of one CD. Which of these could be used to solve for the cost of one CD, assuming each was priced the same?
A) 3x
B) x = 45
C) x = 15
D) 3x = 45

Question

Compact discs are on sale at Listen More to Music. John paid $45.00 for 3 CDs. Let "x" represent the price of one CD. Which of these could be used to solve for the cost of one CD, assuming each was priced the same?
A)	3x	
B)	x = 45	
C)	x = 15	
D)	3x = 45

will.h · Answer

So we know that 3 CDs = 45 
That means 
3x = 45 
To solve for 1 cd we just have to solve for x

will.h · Answer

So we can use 3x = 45 
To solve for x (cost of one Cd)