Question 1038897
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Suppose we have a 400 liter mixture of acid solution, which is 10% acid, and 90% water. 
Let V be the number of liters of pure water to add to the mixture so that it is a 8% acid mixture. 
Find the quantity of water to add. 
Identity the unknown; write an equation for the unknown; solve the equation; state the answer in a full sentence.
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See the lesson <A HREF=https://www.algebra.com/algebra/homework/word/mixtures/Mixture-problems.lesson>Mixture problems</A> in this site, Problem 4.


It is your sample. Read it attentively and use it.


See also the associated lessons when you need them.