Question
Luis wanted to buy some oats. He will have $17 left if he buys 3 kg of oats. However, he will need $5 more to buy 5 kg of oats. What is the cost of 4 kg of oats?
4 m

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Luis wanted to buy some oats. He will have $17 left if he buys 3 kg of oats. However, he will need $5 more to buy 5 kg of oats. What is the cost of 4 kg of oats?