Question

Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains liters of natural oil for every liters of synthetic oil. In order to make liters of Petrolyn oil, how many liters of synthetic oil are needed?

Answer 1

You didn't put any numbers, but I'm going to assume it's 5 liters of natural oil for every 8 liters of synthetic oil and you're asking in order to make 936 liters of petrolyn oil, how many would need to be synthetic. In that case the answer would be 576

Explanation:

( natural oil ) / ( synthetic oil ) = 5/8

Let x = liters of synthetic oil needed

936 - x = liters of natural oil needed

5/8=936-x/x

Multiply both sides by 8x

5x=8(936 - x)

5x=7488 - 8x

13x=7488

x=576