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  • 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 316 liters of synthetic oil are used, how many liters of Petrolyn oil will be made?

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  1. badmood
    • one year ago
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    The Petrolyn is 8/13 natural and 5/13 synthetic. If we start with 760 liters of natural oil we can make: (760 liters Natural) ( 13/8 Petrolyn/Natural ) = 1235 liters Petrolyn Note how adding the 'units' into the calculation makes it clear what cancels with what in the numerical conversion.

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