Write an expression: less than a multiple of a number

Turn the words into symbols, in the form shown in the question.

1. Write an expression for "5 less than 7 times a number x". Write it as ax - b.
2. Write an expression for "11 less than 8 times a number x". Write it as ax - b.
3. Write an expression for "4 less than 8 times a number x". Write it as ax - b.
4. Write an expression for "7 less than 9 times a number x". Write it as ax - b.
5. Write an expression for "12 less than 7 times a number x". Write it as ax - b.
6. Write an expression for "8 less than 9 times a number x". Write it as ax - b.
7. Write an expression for "15 less than 6 times a number x". Write it as ax - b.
8. Write an expression for "7 less than 3 times a number x". Write it as ax - b.
9. Write an expression for "5 less than 6 times a number x". Write it as ax - b.
10. Write an expression for "12 less than 9 times a number x". Write it as ax - b.
11. Write an expression for "8 less than 4 times a number x". Write it as ax - b.
12. Write an expression for "19 less than 14 times a number x". Write it as ax - b.
13. Write an expression for "5 less than 4 times a number x". Write it as ax - b.
14. Write an expression for "21 less than 17 times a number x". Write it as ax - b.
15. Write an expression for "12 less than 13 times a number x". Write it as ax - b.
16. Write an expression for "1 less than 15 times a number x". Write it as ax - b.
17. Write an expression for "49 less than 25 times a number x". Write it as ax - b.
18. Write an expression for "9 less than 13 times a number x". Write it as ax - b.
19. Write an expression for "46 less than 15 times a number x". Write it as ax - b.
20. Write an expression for "6 less than 7 times a number x". Write it as ax - b.