SOLUTION: I read 120 pages of a book. 5 /9 parts of the book is still left for reading. How many pages does the whole book have?

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Question 1086993: I read 120 pages of a book. 5 /9 parts of the book is still left for reading. How many pages does the whole book have?
Found 2 solutions by josmiceli, ikleyn:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
If +5%2F9+ of the book is left, then you
have read +1+-+5%2F9+=+4%2F9+ of the book
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Let +x+ = the number of pages in the whole book
+%284%2F9%29%2Ax+=+120+
+x+=+%289%2F4%29%2A120+
+x+=+270+
The number of pages in the whole book is 270

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
Your equation is 

%284%2F9%29x = 120,

where x is the number of pages in the book.


Then 4x = 120*9  ====>  x = 30*9 = 270.

Answer. 270 pages.