SOLUTION: A low grade of oil contains 2.5% of an additive and a high grade of oil contains 7.5% of an additive. How many liters of the 7.5% additive oil must be added to 500 L of the 2.5% ad

Question 1193722: A low grade of oil contains 2.5% of an additive and a high grade of oil contains 7.5% of an additive. How many liters of the 7.5% additive oil must be added to 500 L of the 2.5% additive oil to get a mixture with 6.5% of the additive?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
500 L of 2.5% additive
x Liters of the 7.5% additive
Mixture result 6.5% additive

Account for the amount of the pure additive.

Solve!

Do all computations LAST.

CHECK - Does this value work?

YES
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