Question 1052447
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A radiator contains 11 quarts of fluid, 30% of which is antifreeze. How much fluid should be drained and replaced 
with pure antifreeze so that the new mature is 50% antifreeze?
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See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/mixtures/Word-problems-on-mixtures-for-antifreeze-solutions.lesson>Word problems on mixtures for antifreeze solutions</A>, Problem 4

in this site.


It is exactly a prototype/analogue/sample to your problem.


Read it attentively. Then substitute your data to get the solution.


Also, you have this free of charge online textbook in ALGEBRA-I in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.


The referred lesson is the part of this textbook in the section "<U>Word problems</U>" under the topic "<U>Mixture problems</U>".


The textbook contains many other solved word problems, as well as many other interesting and useful things.