## anonymous one year ago Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 3 liters of natural oil for every 4 liters of synthetic oil. If 392 liters of synthetic oil are used, how many liters of Petrolyn oil will be made?

1. anonymous

@TaylerMarieMaloley sorry did you reply something?

2. disqin

Using proportions... 3 liters natural and 4 liters synthetic oil makes (3+4=) 7 liters Petrolyn oil. 392 liters of synthetic oil is added... Assuming amount of Petrolyn oil will be $$392+\frac{3}{4}392=686$$ liters! Boom!

3. anonymous

You are a god! thanks @disqin