Question
Mrs Lee has to pay $18 for 3 kg of beef and 4 kg of mutton. She has to pay $23 if she buys 4 kg of beef and 5 kg of mutton. How much does 1 kg of beef cost?
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Mrs Lee has to pay $18 for 3 kg of beef and 4 kg of mutton. She has to pay $23 if she buys 4 kg of beef and 5 kg of mutton. How much does 1 kg of beef cost?