Hopefully I am in the right category. If not please kindly inform me about the right one.
I don't have the original source of this problem.
It goes:
A goldsmith needs to mix gold with a fineness of 500%o and gold with a fineness of 800%o received 500 grams of gold with a fineness of 650%o. How much should he take 500%o fine gold and how much 800%o fine gold?
I know how to do it one way. But I was shown this way and I don't understand where it came from.
Can someone explain how they did this:
I don't have the original source of this problem.
It goes:
A goldsmith needs to mix gold with a fineness of 500%o and gold with a fineness of 800%o received 500 grams of gold with a fineness of 650%o. How much should he take 500%o fine gold and how much 800%o fine gold?
I know how to do it one way. But I was shown this way and I don't understand where it came from.
Can someone explain how they did this:
