Petrolyn motor oil is a combination of natural oil and synthetic oil. it contains 6 liters of natural oil for every 5 liters of synthetic oil. in order to make 847liters of petrolyn oil, how many liters of natural oil are needed?

In a petrolyn motor oil, in every 6 liters of natural, there is also 5 litters of synthetic oil. So, if we put it in a formula, it would be 6x+5x=11x of petrolyn motor oil. If 11x=847 petrylon oil, every x would have 77 litters of petrolyn oil. Then that means that 6x=462 litters of natural, which was needed in the 847 litters of petrylon oil.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15