One-dimensional linear equation—

Solution: Let Xinxin have x glass balls, then there are 2X tung trees.

2X—3=X+3

The solution is X=6.

Tong Tong has: 2×6= 12 (PCs).

A: Tong Tong has 12 glass balls, and Xinxin has 6 glass balls.

Well, I wish you progress in your study. If you are satisfied, please adopt it. Thank you! !