\(76-6\left(x-1\right)=10\)

\(=>6\left(x-1\right)=76-10\)

\(=>6\left(x-1\right)=66\)

\(=>x-1=66:6\)

\(=>x-1=11\)

\(=>x=11+1\)

\(=>x=12\)

a. Thay a = 14, b = 15, c = 10, ta có:

\(a=a\times b+200\)

\(=>a=14\times15+200\)

\(=>a=210+200=410\)

___

\(b=a\times b\times c\)

\(=>b=14\times15\times10=2100\)

b. Vì 410 < 2100 nên a < b.

\(#NqHahh\)

* Hình ảnh minh hoạ

C. 5 cặp

2. won't be

3. Was he - was

4. does

5. did - go

6.will be

7. was

8. were

9. visited

10. did - went

11. washes

12. were

13. listened

14. Did he have

15. took

16. chats

17. go

18. won't eat

19. wore

20. taught

21. danced - sang

22. got - had

23. bought

24. won't go

25. had

\(#NqHahh\)

\(H=\left\{-2;-1;0;1;2;3\right\}\)