SOLUTION: In a lab, a 30% acid solution is being mixed with a 5% acid solution to create a 10% acid solution. What is the ratio of the amount of the 30% solution to the amount of 5% solution

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Question 1012272: In a lab, a 30% acid solution is being mixed with a 5% acid solution to create a 10% acid solution. What is the ratio of the amount of the 30% solution to the amount of 5% solution used to create the 10% solution?

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x, how much 5% acid
1, the one unit for the completed solution;
1-x, how much 30% acid

5x%2B30%281-x%29=1%2A10
5x%2B30-30x=10
-25x%2B30=10
-25x=-20
x=20%2F25
x=4%2F5---------------1-x=5%2F5-4%2F5=1%2F5

Ratio of the 30% to the 5% acids is 1:4.