SOLUTION: If a student wants to mix a 45% acid solution with a 70% acid solution to create a 20 liter 60% acid solution, how many liters of 45% acid should they use?
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Question 960987: If a student wants to mix a 45% acid solution with a 70% acid solution to create a 20 liter 60% acid solution, how many liters of 45% acid should they use? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of 45% solution needed
Let = liters of 70% solution needed
--------------------------------------
(1)
(2)
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(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
---------------------------
and
(1)
(1)
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8 liters of 45% solution are needed
check:
(2)
(2)
You can finish this
