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OpenStudy (anonymous):
A pharmacist mixed some 10%-saline solution with some 15%-saline solution to obtain 100 mL of a 12%-saline solution. How much of the 10%-saline solution did the pharmacist use in the mixture? A 60 mL B 45 mL C 40 mL D 25 mL
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OpenStudy (anonymous):
\[ 10x + 15( 100 - x ) = 12 (100 )\\\\ -5 x = 1200- 1500 \\\\ x = 60 \ ml\]
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