SOLUTION: A nurse mixes 50cc of a 60% saline solution with a 20% saline solution to produce a 36% saline solution. How much of the 20%solition should he use?

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Question 1016269: A nurse mixes 50cc of a 60% saline solution with a 20% saline solution to produce a 36% saline solution. How much of the 20%solition should he use?
Found 2 solutions by jorel555, ikleyn:
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
50(.6)+n(.2)=(50+n).36
30+.2n=18+.36n
.16n=12
n=75cc of 20% solution are needed ☺☺☺☺

Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.
It is a typical mixture word problem. There is a bunch of lessons on mixture problems in this site:
    - Mixture problems
    - More Mixture problems
    - Solving typical word problems on mixtures for solutions
    - Word problems on mixtures for antifreeze solutions
    - Word problems on mixtures for alloys
    - Typical word problems on mixtures from the archive
Read them attentively and become trained in solving word mixture problems.
Become an expert in this area.