My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum

LinkBack Thread Tools Display Modes
April 4th, 2012, 04:39 PM   #1
Joined: Apr 2012

Posts: 14
Thanks: 0

Mixture Problem

What would my equation(s) be to solve this mixture story problem?

How much 12% Na2SO4 and pure water must be mixed to produce 22.8 gallons of a mixture that is 7% sodium sulfate?

I started with: Let x = the # of gallons of 12% Na2SO4
And Let y = the # of gallons of 100% water or should it be Let 22.8-x = the # of gallons of 100% water needed?
Kimmysmiles0 is offline  
April 4th, 2012, 04:49 PM   #2
Senior Member
MarkFL's Avatar
Joined: Jul 2010
From: St. Augustine, FL., U.S.A.'s oldest city

Posts: 12,211
Thanks: 520

Math Focus: Calculus/ODEs
Re: Mixture Problem

I would start by finding the amount in gallons of pure sodium sulfate we need:

Now we want to find how many gallons x of the 12% mixture contains that amount:

So, we need 13.3 gallons of the 12% sodium sulfate and 22.8 - 13.3 = 9.5 gallons of water.

We could also simply the process somewhat (combine the two steps into one) and state:

and then the amount of water is 22.8 - 13.3 = 9.5.
MarkFL is offline  
April 4th, 2012, 08:38 PM   #3
Math Team
Joined: Dec 2006
From: Lexington, MA

Posts: 3,267
Thanks: 407

Re: Mixture Problem

Hello, Kimmysmiles0!


Since we are adding pure water, we will consider the amount of water at each stage.

soroban is offline  

  My Math Forum > High School Math Forum > Algebra

mixture, problem

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
mixture problem weeweewee Algebra 1 January 6th, 2012 02:51 AM
A mixture problem alikn Elementary Math 3 November 16th, 2009 12:22 PM
Mixture Problem, please help Horizont Algebra 3 September 16th, 2008 11:12 AM
solution mixture word problem sony102 Elementary Math 4 August 14th, 2008 10:21 AM
Mixture Problem, please help Horizont Abstract Algebra 0 December 31st, 1969 04:00 PM

Copyright © 2019 My Math Forum. All rights reserved.