SOLUTION: [ A chemist mixes a 10% saline solution with a 20% saline solution to make 500 milliliters of a 16% saline solution. How many milliliters of each solution does the chemist mix toge

Question 817668: [ A chemist mixes a 10% saline solution with a 20% saline solution to make 500 milliliters of a 16% saline solution. How many milliliters of each solution does the chemist mix together? ]
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
10w + 20s = (16)500
10w + 20s = 8000
w + s = 500
s = 500 - w
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10w + 20s = 8000
10w + 20(500 - w) = 8000
10w + 10000 - 20w = 8000
10w = 2000
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w = 200 ml of 10% saline
s = 300 ml of 20% saline
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