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MathNet 2013 Question 50

Math Olympiad Vault · MathNet 2013

Question 50

Yesterday Meta bought 5 litres of milk and 4 loaves of bread for 9.10 euros. Today milk is $10\%$ cheaper and bread is $15\%$ cheaper. The same quantities today would cost 7.94 euros. What did a litre of milk and a loaf of bread cost yesterday?