SOLUTION: At Elisa’s Printing Company LLC there are two kinds of printing presses. Model A which can print 70 books per day and Model B which can print 55 books per day. The company owns 1

Question 1174035: At Elisa’s Printing Company LLC there are two kinds of printing presses. Model A which can print 70 books per day and Model B which can print 55 books per day. The company owns 14 total printing presses and this allows them to print 905 books per day. How many of each type of presses do they have?
Answer by ikleyn(52814) (Show Source): You can put this solution on YOUR website!
.


Let x be the number of printing presses of type A.

Then the number of other presses is  (14-x).


Now you write the equation for total printed books per day


    70x + 55*(14-x) = 905  books.


I will not explain, how to write this equation and why I wrote it in this form -simply because it is ABSOLUTELY CLEAR.


From the equation


    x =  = 9.


ANSWER.  There are 9 printing presses of type A and 14-9 = 5 printing presses of type B.

Solved.

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