求未知数x：

（1）6×3-1.8x=7.2          

（2）2×（2y-15）=10          

（3）3.5x-0.8x=54．

根据句意及图片提示填写适当的单词.

1．This is not my _______．It's Linda's．

2．Can you see a blue ________ in the room?

3．For dinner,Lily only eats an _______．

4．Every day his uncle plays ___________ with his friends．

5．At Gina's home,I can see a Chinese  __________．