SOLUTION: How much 95% and 30% alcohol should be mixed to make 1 pint of 70% alcohol?

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Question 560482: How much 95% and 30% alcohol should be mixed to make 1 pint of 70% alcohol?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
percent ---------------- quantity
Alcohol type I 95 ---------------- x pint
alcohol type II 30 ---------------- 1 - x pint
Mixture 70.00% ---------------- 1

95x+30(1-x)=70*1

95x+30- 30x=70
95x-30x=70-30
65x=40
/65
x=0.62 pint 95.00% Alcohol type I
0.38 pint 30.00% alcohol type II
m.ananth@hotmail.ca