Bottles

The must is sold in 5-liter and 2-liter bottles. Mr Kucera bought a total of 216 liters in 60 bottles. How many liters did Mr. Kucera buy in five-liter bottles?

Correct result:

a =  160 l

Solution:

a/5+b/2 = 60
a+b = 216

2a+5b = 600
a+b = 216

a = 160
b = 56

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