SOLUTION: How many pints of 20% acid solution and 30% acid solution must be mixed to make 20 pints of 24% acid solution

Algebra.Com
Question 933454: How many pints of 20% acid solution and 30% acid solution must be mixed to make 20 pints of 24% acid solution
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Do it like this one. Only the numbers are different.
-----------
Amanda wants to make 8 gal. of a 20% saline solution by mixing together a 56% saline solution and a 8% saline solution. How much of each solution must she use?
================
e = amount of 8%
f = amount of 56%
---
e+ f = 8 (total solution)
8e + 56f = 20*8 (total saline)
---
e+ f = 8
e + 7f = 20
------------ Subtract
-6f = -12
f = 2
e = 6

RELATED QUESTIONS

How many gallons of a 20% acid solution must be mixed with 5 gal of a 40% acid solution... (answered by josgarithmetic)
how many gallons of a 20% acid solution must be mixed with 6 gallons of a 30% acid... (answered by KnightOwlTutor)
How many gallons of a 15% acid solution must be mixed with 5 gal of a 30% acid solution... (answered by josgarithmetic,greenestamps)
How many gallons of a 10% acid solution and a 30% acid solution need to be mixed to make... (answered by richwmiller,fcabanski)
how many ounces of 20% hydrochloric acid solution and 50% hydrochloric acid solution must (answered by Boreal)
How many ounces each of a 20% acid solution and a 50% acid solution must be mixed... (answered by Alan3354,ikleyn,greenestamps)
How many liters of a 12% acid solution must be mixed with 10 Liters of a 24% Acid... (answered by josgarithmetic)
How many pints of a 5% antifreeze solution and how many pints of a 20% antifreeze... (answered by scott8148)
How many ounces of 20% and 35% acid solution should be mixed to produce 15 oz of 30% acid (answered by ewatrrr)