SOLUTION: Please help A tank holds 30 liters of a chemical solution. Currently, the solution has a strength of 60%. How much of this should be drained and replaced with a 90% solution to

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: Please help A tank holds 30 liters of a chemical solution. Currently, the solution has a strength of 60%. How much of this should be drained and replaced with a 90% solution to       Log On

 Ad: Over 600 Algebra Word Problems at edhelper.com Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Word Problems: Mixtures Solvers Lessons Answers archive Quiz In Depth

 Question 491876: Please help A tank holds 30 liters of a chemical solution. Currently, the solution has a strength of 60%. How much of this should be drained and replaced with a 90% solution to get a final strength of 80%? How many liters should be drained and replaced with 90 % solutionAnswer by stanbon(57224)   (Show Source): You can put this solution on YOUR website!A tank holds 30 liters of a chemical solution. Currently, the solution has a strength of 60%. How much of this should be drained and replaced with a 90% solution to get a final strength of 80%? --- Equation: active - active + active = active 0.60*30 - 0.60x + 0.90x = 0.80*30 --------------------------------------- Multiply thru by 100 to get: 60*30 - 60x + 90x = 80*30 ----------------------------- 30x = 20*30 x = 20 liters (amt of 60% to be replaced by 90% solution) ======================== Cheers, stan H.