SOLUTION: A 20% ACL solution and a 70% HCL solution are to be mixed to obtain 900ml of a 30% HCL solution. How many milliliters of solution must be mixed?

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A 20% ACL solution and a 70% HCL solution are to be mixed to obtain 900ml of a 30% HCL solution. How many milliliters of solution must be mixed?      Log On

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Question 219966: A 20% ACL solution and a 70% HCL solution are to be mixed to obtain 900ml of a 30% HCL solution. How many milliliters of solution must be mixed?
Answer by rfer(10432) About Me  (Show Source):
You can put this solution on YOUR website!
.2x+.7(900-x)=900*.3
.2x+630-.7x=270
-.5x=-360
x=720 ml of 20%
900-x=180 ml 70%