Marie mixes 16 liters of 78% acid solution with a 25% acid solution to make a 41% acid solution. how many liters of 25% solution did she use? 8 liters 12 liters 13.7 liters 37 liters

16 liters x 0.78 = 12.48 liters

0.25x +12.48 = 0.41(16+x)

0.25x+12.48 = 6.56 +0.41x

5.92 = 0.16x

x = 5.92/0.16 = 37 liters

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