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

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Question 1108881: 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!
Find the x-intercepts.
f(x)= 2x+x(x-7)
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answered