SOLUTION: A chemistry teacher needs to mix a 30% salt solution
with a 70% salt solution to make 20 qt of a 40% salt
solution. How many quarts of each solution should the
teacher mix to ge
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-> SOLUTION: A chemistry teacher needs to mix a 30% salt solution
with a 70% salt solution to make 20 qt of a 40% salt
solution. How many quarts of each solution should the
teacher mix to ge
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Question 1026009: A chemistry teacher needs to mix a 30% salt solution
with a 70% salt solution to make 20 qt of a 40% salt
solution. How many quarts of each solution should the
teacher mix to get the desired result? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = quarts of 30% solution needed
Let = quarts of 70% solution needed
---------------------
(1)
(2)
-------------------------
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
----------------------
(2)
(1)
------------------------
and
(1)
(1)
------------------
15 quarts of 30% solution is needed
5 quarts of 70% solution is needed
--------------------------------
check:
(2)
(2)
(2)
(2)
(2)
OK
