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If a 12 percent brine solution was mixed with a 16 percent brine solution obtaining 40ml of a 15 percent brine solution how much of the 12 percent brine solution was used in the mixture?
Sk8ingkacheek
Let x = the amount of 12% solution.
Let 40 - x = the amount of 16% solution. So we have,
(0.12)x + (0.16)(40 - x) = (0.15)(40)
(0.12)x + 6.4 - 0.16x = 6
-0.04x = 6 - 6.4
-0.04x = -0.4
x = -0.4/-0.04
x = 10
There are 10 ml of the 12% solution, which leaves 30 ml as the amount of 16% solution.
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∙ 13y ago
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