Current location - Training Enrollment Network - Mathematics courses - Math problem: Xiaowen used 1 1.8 yuan bought two pencils and three pens, and Xiao just bought three pencils and two pens with 8.7 yuan. How much is this pen? Ok, thank you.
Math problem: Xiaowen used 1 1.8 yuan bought two pencils and three pens, and Xiao just bought three pencils and two pens with 8.7 yuan. How much is this pen? Ok, thank you.
In the title, "Xiaowen buys two pencils and three pens, and it costs 1 1.8 yuan".

Launch: Xiaowen bought 6 pencils and 9 pens for 35.4 yuan.

In the title, "I just bought three pencils and two pens and spent them in 8.7 yuan."

Launch: I just bought 6 pencils and 4 pens and spent 17.4 yuan.

Pen =(35.4- 17.4)÷(9-4)=3.6 yuan.