SOLUTION: Joan had 2.5 times as many books as I do. You could also say she has 27 more books than I do. How many do I have?

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Question 1061787: Joan had 2.5 times as many books as I do. You could also say she has 27 more books than I do. How many do I have?
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
2.5X - X = 27,

1.5X = 27,

X = 27%2F1.5 = 18.

Answer. You have 18 books. Joan has 18+27 = 45 books.