Algebra problem i dont understand how to do......?

Question

The two top-selling DVDs of 2003 grossed a combined total of $600.9 million. the top-selling DVD grossed $39.9 million more than the DVD ranked second. ow much did the top-selling DVD gross?

Answer 1

Create an equation on this:
Top selling DVD: n + 39.9 million
Second DVD: n

n + (n + 39,900,000) = 600,900,000

Combine like terms:
2n + 39,900,000 = 600,900,000

Subtract 39.9 million:
2n + 39,900,000 - 39,900,000 = 600,900,000 - 39,900,000

Combine like terms:
2n = 561,000,000

Divide by 2:
n = 280,500,000

Plug that number into our spots:

N (second dvd) = $280,500,000
N = 39.9 million (top dvd) = $280,500,000 + 39,900,000 = $320,400,000

If we add those two values together, we'll see we get $600.9 million which was the total in sales.

Answer 2

Let x be the top selling DVD. Thus x + x -39.9=600.9=2x-39.9=600.9=2x=640.8=320.4. The top selling DVD grossed $320.4 million. Hope you understand how this was done. Good luck with the rest of your homework.

Answer 3

If the top one grossed $x million, then the second one grossed $(x-39.9) million. Together they grossed $600.9 million, so we get
x + (x-39.9) = 600.9
so 2x - 39.9 = 600.9
=> 2x = 600.9 + 39.9 = 640.8
=> x = 640.8 / 2
= 320.4
So the top-selling DVD grossed $320.4 million.