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... ducks, you will get 80 Wen. How many chickens and ducks are there respectively?”
Yuanyuan and Manman spread their fingers to count, but they discovered that there was nowhere to begin with.
Qin Mian relaxed and leaned back in his chair, smiling and glancing at Lei Tie, “Yuanyuan and Manman, your Old Dad is powerful! Ask him if you don’t understand.” It was a quadratic equation of two variables. He didn’t believe that Lei Tie could solve it.
The corner of Lei Tie’s mouth twitch ...
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