SOLUTION: if someone buy a dozen of cakes. The small cakes cost 1,75$ each and the big ones cost each 3,85 with taxes included. And you paid 31,50$ in total. how many cakes did you bought

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Question 1171916: if someone buy a dozen of cakes. The small cakes cost 1,75$ each and the big ones cost each 3,85 with taxes included. And you paid 31,50$ in total. how many cakes did you bought
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

If B is the number of big cakes, then the number of small cakes is (12-B).


You then write the total money equation


    1.75*(12-B) + 3.85*B = 31.50   dollars.


From the equation


    B = %2831.50-1.75%2A12%29%2F%283.85-1.75%29 = 5.


ANSWER.  5 big cakes and 12-5 = 7 small cakes.

Solved.