Question
Xuan bought 7 kg of pork and 4 kg of beef for $141. If she brought 4 kg of pork and 7 kg of beef, she would have to pay $18 less. How much did 1 kg of pork cost?
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Xuan bought 7 kg of pork and 4 kg of beef for $141. If she brought 4 kg of pork and 7 kg of beef, she would have to pay $18 less. How much did 1 kg of pork cost?