How do you do this problem?
A petroleum company has two different sources of crude oil. The first source provides crude oil that is hydrocarbons, and the second one provides crude oil that is hydrocarbons. In order to obtain gallons of crude oil that is hydrocarbons, how many gallons of crude oil must be used from each of the two sources?
Comments
Since both sources provide crude oil that is hydrocarbons and you do not differentiate between the two sources, it doesn't matter whether you mix the two or take it all from one of the two sources.
I think you are missing some information.