# Sweets

3 chocolate and 7 cakes cost 85, - CZK. 2 chocolates and 6 cakes cost 86, - CZK. How much is 5 chocolates and 9 cakes?

I wonder how to get the result, but only by logic without the use of a system of equations

I wonder how to get the result, but only by logic without the use of a system of equations

**Result****Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):**

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#### To solve this example are needed these knowledge from mathematics:

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