SOLUTION: You need a 70% alcohol solution. On hand, you have a 195 mL of a 60% alcohol mixture. You also have 85% alcohol mixture. How much of the 85% mixture will you need to add to obtain

Question 1108542: You need a 70% alcohol solution. On hand, you have a 195 mL of a 60% alcohol mixture. You also have 85% alcohol mixture. How much of the 85% mixture will you need to add to obtain the desired solution?
You will need
____mL of the 85% solution
to obtain
____mL of the desired 70% solution.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Using x for amount of the 85% to use and accounting for amount of just the alcohol,

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Answer by ikleyn(52786)   (Show Source): You can put this solution on YOUR website!
.
For those who really wants to learn on how to solve these simple and basic word mixture problems, I prepared these introductory lessons
    - Mixture problems
    - More Mixture problems
    - Solving typical word problems on mixtures for solutions
    - Typical word problems on mixtures from the archive
in this site.

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

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

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook in the section "Word problems" under the topic "Mixture problems".

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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