Tìm x, y

\(\dfrac{3x+1}{y}=\dfrac{y+5}{7}=\dfrac{3y+15}{21}\)

12.5 km

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1. you ( be) will be able to speak english better if you learn harder

2. can you showw me how ( use ) to use the computer

3. lats year he ( go) went to american with his family

4. I think he ( go) will go there a gain this summer

5. hong and nam ( be ) were absent from class yesterday

6. when my sister and I ( live) lived in hue , we ( visit) visited a lot of interesting places

7. nam's family ( fly) flew to HCM city last year . there they (take) took a lot of pictures and ( buy) bought a lot of presents

nai điếclà nai hư tai

hư tai=24