Question 1018632
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we have two mixtures: one contains 7% acid and the other one contains 4% acid.  How much do we combine of each to the two available mixtures to get  300 ml of 5% mixture.
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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 how to solve problems like this, once and for all.
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