SOLUTION: a solution that is 10% antifreeze is mixed with a solution that is 20% antifreeze to produce 50L of solution that is 15.6% antifreeze.how many liters at the 10% solution are used?

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Question 1097112: a solution that is 10% antifreeze is mixed with a solution that is 20% antifreeze to produce 50L of solution that is 15.6% antifreeze.how many liters at the 10% solution are used?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x, volume of the 10% antifreeze

10x%2B20%2850-x%29=%2815.6%29%2850%29
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x%2B2%2850-x%29=%2815.6%29%285%29
.
.