Question

1) 7 audio CD and 4 video CD cost 7000, while 5 audio CD and 3 video CD cost
5080. Find the cost of an audio CD and a video CD​

Answer 1

Step-by-step explanation:

Let,

The cost of one audio CD be 'x' and

The cost of one video CD be 'y'

So,

7x+4y=7000 and

5x+3y=5080

Solving both the equations

Multiplying 3 to the 1st equation,

21x+12y=21000 and

Multiplying 4 to the 2nd equation,

20x+12y=20320

We get,

x=680

Substituting the value of x in 1st equation,

7×680+4y=21000

4760+4y=21000

4y=21000-4760

4y=16240

y=16240/4

Therefore,

y=4060

So,

The cost of one audio CD is 680 and

The cost of one video CD is 4060

Hope you understood

Answer 2

Answer:

Here is your correct answer

please mark me as BRAINLIEST