SOLUTION: Hello, Please help with this problem. I thought I worked correctly but answer seems to conflict with the problem. This is what I came up with.... .10x + .90(90)=.50(x+90)

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Question 97093: Hello,
Please help with this problem. I thought I worked correctly but answer seems to conflict with the problem. This is what I came up with....
.10x + .90(90)=.50(x+90)
90=x
Please show me where I went wrong. Here's the question?
How many liters of a 10% alcohol solution must be mixed with 90 liters of a 90% solution to get a 50% solution?
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
YOU DIDN'T GO WRONG 90 IS THE CORRECT ANSWER.
PROOF:
.10*90+.90*90=.5(90+90)
9+81=.5(180)
90=90