A website that sells songs for downloading increased its price per song from $0.99 to $1.29. Ariana spent $15.36 downloading songs before and after the price increase. She downloaded 4 more songs at $0.99 than at $1.29. The set of equations below represents the situation where x is the number of songs Ariana downloaded at $0.99 and y is the number of songs she downloaded at $1.29.
x = y + 4
.99x + 1.29y = 15.36
What is the exact number of songs Ariana downloaded at the $0.99 price?

Question

A website that sells songs for downloading increased its price per song from $0.99 to $1.29. Ariana spent $15.36 downloading songs before and after the price increase. She downloaded 4 more songs at $0.99 than at $1.29. The set of equations below represents the situation where x is the number of songs Ariana downloaded at $0.99 and y is the number of songs she downloaded at $1.29.
x = y + 4
.99x + 1.29y = 15.36
What is the exact number of songs Ariana downloaded at the $0.99 price?

anonymous · Answer

@johnweldon1993  would you mind helping me again?

johnweldon1993 · Answer

Well for this, we have a system of equations and we just want to solve for 'x'

johnweldon1993 · Answer

Look at that top equation

$$\large x = y + 4$$

We want to solve this for 'y'...so that way, when we substitute it into the second equation, we will only have 'x' to deal with

so solve that for 'y'

anonymous · Answer

How would I do that?

anonymous · Answer

$$x = y + 4$$$$-4x = y $$

anonymous · Answer

@johnweldon1993 are you still on