posted by Melvin .
A perfume maker wishes to blend perfume valued at $ 410 an ounce with perfume worth $ 250 an ounce to obtain a mixture of 40 ounce worth $ 300 an ounce. How much of the $ 410 perfume should he use?
If you take the amount of $410 perfume to be used as x ounces, the amount of $250 perfume to be used becomes (40-x) ounces.
For the final mixture to be worth $300 an ounce:
410x + 250(40-x) = 300(40)
Solve for x