SOLUTION: after two fifths of its textbooks a bookstore had 810 books left. How many textbooks were in the bookstore initially

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: after two fifths of its textbooks a bookstore had 810 books left. How many textbooks were in the bookstore initially       Log On


   



Question 1108883: after two fifths of its textbooks a bookstore had 810 books left. How many textbooks were in the bookstore initially
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
after two fifths of its textbooks a bookstore had 810 books left. How many textbooks were in the bookstore initially
----
Let the initial number be "x".
Equation:
x - (2/5)x = 810 books
-----
(3/5)x = 810
(1/5)x = 270
x = 1350
---------
Cheers,
Stan H.
--------------