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Solving equations in fifth grade mathematics. Thank you.
Solution: Suppose Zhang Peng made x three-pointers in this game.

3x+2(9-x)=2 1

3x+ 18-2x=2 1

x+ 18- 18 = 2 1- 18

x=3

A: Zhang Peng scored three three-pointers in this game.

I hope I can help you _

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