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November 20, 2014

November 20, 2014

Posted by **steve** on Monday, February 22, 2010 at 9:41am.

- algebra -
**drwls**, Monday, February 22, 2010 at 10:05amLet x be the number of ml that must be added. The amount of acid contained in the mix can be written two ways, and is:

0.15*80 + 0.20x = 0.18*(80 + x)

Solve for x

12 + 0.20x = 14.4 + 0.18x

0.02x = 2.4

x = 120 ml

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