SOLUTION: Please help me solve this word problem, using substitution or elimination: How much of a perfume that sells for $35 dollar per ounce should be mixed with a perfume that sells fo

Question 1025105: Please help me solve this word problem, using substitution or elimination:
How much of a perfume that sells for $35 dollar per ounce should be mixed with a perfume that sells for $15 dollar per ounce to make a 3-ounce bottle of perfume that can be sold for $63?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = ounces of $35/oz perfume needed
Let = ounces of $15/oz perfume needed
---------------------------------------

Perfume selling for $21/oz is desired
(1)
(2)
---------------------------
(2)
Multiply both sides of (1) by and
subtract (1) from (2)
(2)
(1)
-----------------------

and
(1)
(1)
-----------------
0.9 ounces of $35/oz perfume is needed
2.1 ounces of $15/oz perfume is needed
----------------------------------
check:
(2)
(2)
(2)
(2)
(2)
OK
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