SOLUTION: 15 ml of 25% acid solution must be mixed with how much 30% acid to yield a 27% acid solution?

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Question 582679: 15 ml of 25% acid solution must be mixed with how much 30% acid to yield a 27% acid solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
15 ml of 25% acid solution must be mixed with how much 30% acid to yield a 27% acid solution?
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Equation:
acid + acid = acid
0.25*15 + 0.30x = 0.27(15+x)
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Multiply thru by 100 to get:
25*15 + 30x = 27*15 + 27x
3x = 2*15
x = 10 ml (amt. of 30% solution needed)
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Cheers,
Stan H.
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