Answer:
1. 15 - a/b
2. n - 7
3. 4 + 2n = 60
4. n + 6 = 40
5. 3n - 20
6. x² = 16
7. 2n ÷ 5
8. 2n + 5 = 37
9. n ÷ 2
10. 10 - (n × 12)
