Tìm a theo b

8a(a+2b)=5b(b+2a)

1. Has Jack gone to school yet?

2. Tonia has sent twenty invitations so far.

3. Tina took a test three days ago.

4. I sent you an email two days ago but you haven’t replied.

5. Helen has already had her breakfast.

6.quê

7.Nam

8.người

9.Hương

10.ba

11.che