Question 1017187
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How many cubic centimeters of a solution that is 20% acid and of another solution that is 45% acid should be mixed to produce 100cm^3 of a solution that is 30% acid? 
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It is a typical mixture word problem.

See the lesson <A HREF=http://www.algebra.com/algebra/homework/word/mixtures/Solving-typical-mixture-problems.lesson>Solving typical word problems on mixtures for solutions</A> in this site, Problem 1.

This problem is very similar to yours.

In this lesson you will find the detailed solution. 

Consider it as a sample. Read it attentively.

Then solve your problem by substituting your data.

In this way you will learn, once and for all, how to solve problems like this.
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