1. 3b-4
2. c+6
3. 12-m
4. 4x-2
5. n+(7×y)
6. 8x+2
7. n÷4
8. 20(x+y)
9. 10r+15
10. (y÷5)+30

B.

1. four added to three times a number x
2. three multiplied to a number x minus four
3. two times a number a added to three times a number b
4. three subtracted by a number x over seven
5. nine times a number x added to one
6. six times a number x minus five
7. five multiplied to a number y equal to twenty five
8. two multiplied by the sum of a number n and three is subtracted by five
9. five added to a number x over three
10. one is subtracted by three times a number A

Hope It Helps:)