SOLUTION: A 3% saline solution is combined with a 5% saline solution to form 10 ounces of a 3.8% saline solution. How many ounces of the 3% solution are used?
Question 996276: A 3% saline solution is combined with a 5% saline solution to form 10 ounces of a 3.8% saline solution. How many ounces of the 3% solution are used? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = ounces of the 3% solution needed
Let = ounces of the 5% solution needed
-----------------------
(1)
(2)
------------------------------
(2)
(2)
--------------------
Multiply both sides of (1) by and
subtract (1) from (2)
(2)
(1)
--------------------
and
(1)
(1)
(1)
6 ounces of the 3% solution are needed
---------------
check:
(2)
(2)
(2)
(2)
(2)
OK
