как решить уравнение:x+(x-63)=657

Помогите пожалуйста с английским.

Complete the sentences with the correct form of the verb in brackets.

1 You (ever/write) to your Prime Minister?

2 This is the second time I (make) that mistake.

3 A: When (be) the last time you (see) Cathy?

   B: Ten years ago.

4 A: How (business/go) for you at the moment?

   B: Right now we (not/do) too well but last year we (make) quite a substantial profit.

5 I (be) very nervous at the dentist this morning as it was the first time I (see) him since October 1992.

6 A: How long (you/have) this pain in your shoulder?

   B: For about three months now doctor.

7 You look tired. I hope you (not/work) too hard at your computer.