SOLUTION: E-Chem Testing has a solution that is 80% base and another that is 30% base. A technician needs 200 L of a solution that is 62% base. The 200 L will be prepared by mixing the two s

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Question 203450: E-Chem Testing has a solution that is 80% base and another that is 30% base. A technician needs 200 L of a solution that is 62% base. The 200 L will be prepared by mixing the two solutions on hand. How much of each should be used?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
let x=80% base=128 L
let 200-x=30% base=72 L
.8x+.3(200-x)=.62*200
.8x+60-.3x=124
.5x=64
x=128