SOLUTION: Lisa sold 50% of her books, gave away 60% of those that were left, and then had 8 books left. How many books did he have to begin with?

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Question 188335: Lisa sold 50% of her books, gave away 60% of those that were left, and then had 8 books left. How many books did he have to begin with?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the original amount of books
:
x-.5x-.6(.5x)=8
:
x-.5x-.3x=8
:
.2x=8
:
x=40 books