SOLUTION: Combining 25% sodium bromide, with 80% sodium bromide mixed up 200 liters of 60% sodium bromide, how much of each solution was used?

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Question 816695: Combining 25% sodium bromide, with 80% sodium bromide mixed up 200 liters of 60% sodium bromide, how much of each solution was used?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Temperature must be several degrees above room-temperature.
u = liters of 25%
v = liters of 80%

%2825u%2B80v%29%2F200=60 and u%2Bv=200
Solve for the variables.