Question 1124590
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<pre>
Your equation is


    {{{(0.18*1.75 + A)/(1.75+A)}}} = 0.6,   


where A is the amount of the pure alcohol to add.


    0.18*1.75 + A = 0.6*(1.75 + A)


    A - 0.6*A = 0.6*1.75 - 0.18*1.75


    A = {{{(0.6*1.75 - 0.18*1.75)/(1-0.6)}}} = 1.8375 liters of pure alcohol to add.


<U>Check</U>.  {{{(0.18*1.75 + 1.8375)/(1.75+1.8375)}}} = 0.6.   ! Correct !


<U>Answer</U>.  1.8375 liters of pure alcohol to add.
</pre>

Solved.


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It is a standard and typical mixture problem.


For introductory lessons covering various types of mixture word problems see

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/mixtures/Mixture-problems.lesson>Mixture problems</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/mixtures/More-Mixture-problems.lesson>More Mixture problems</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/mixtures/Solving-typical-mixture-problems.lesson>Solving typical word problems on mixtures for solutions</A> 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/mixtures/Typical-word-problems-on-mixtures-from-the-archive.lesson>Typical word problems on mixtures from the archive</A>

in this site.


You will find there ALL TYPICAL mixture problems with different methods of solutions,
explained at different levels of detalization, &nbsp;from very detailed to very short.


Read them and become an expert in solution mixture word problems.


Also, &nbsp;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 lessons are the part of this textbook in the section "<U>Word problems</U>" under the topic "<U>Mixture problems</U>".



Save the link to this online textbook together with its description


Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson


to your archive and use it when it is needed.


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<U>Be aware</U> :  &nbsp;&nbsp;the solution and the answer by &nbsp;@josgaritmetic are &nbsp;&nbsp;<U>T O T A L L Y &nbsp;&nbsp;W R O N G</U>.


For your safety, simply ignore it !



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<U>Comment from student</U> : But josarfthmetic got the same answer? anyway thanks 
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<U>My response</U> : Yes, he got the correct answer by fixing his errors after my notice.