Tìm số nguyên $x$ thỏa mãn $x-(20-x)=x-14$.

12. Bunchett | the | to | dirty | had | Today | was | ’s | Ms | that | so | cleaners. | call | classroom | she |

      => Today Ms Bunchett 's .      

13. students | no | All | exams | succeeded. | the | tried | during | to | the | but | one | cheat |

      => All the      

14. the | school | will | schedule, | the | class | Because | every | have | whole | Saturday. | of |

      => Because of the schedule,      

15. to | his | Mr | test. | students | for | Pratchett | ready | the | asked | get |

      => Mr Pratchett      

16. cancelled | trip | the | due | director | to | The | weather. | bad |

      => The director      

17. ? | in | Why | does | so | the | morning | early | school | the | start |

      => Why does      

18. Teachers | correct | copies | on | their | only. | Fridays |

      => Teachers      

19. yet | it | finished | so | gave | haven’t | ! | I | that | homework | Ms | us | hard | was | Yesterday | Bunchett | the |

      => Yesterday the homework      

20. class. | in | phone | You | cannot | cellular | the | school | use | the | during |

      => You cannot