Answer:
1. x=30
2. x=21
3. x=49
4. x=22
Explanation:
1.
in order to get from 3 to 18 we multiplied by 6. so do the same to 5 to get 30
2.
in order to get from 3 to 9 we multiplied by 3. so do the same for 7 to get 21
3.
in order to get from 9 to 63 we multiplied by 7. so do the same for 7 to get 49.
4.
in order to get from 8 to 16 we multiplied by 2. so do the same for 11 to get 22.