找出下列各題的未知數 y

1. 41 + y = 47 y =
2. 58 - y = 26 y =
3. 3y + 10 = 19 y =
4. 4y - 15 = 33 y =
5. 6y  = 72 y =
6. 7y + 3 = 87 y =
7. y ÷ 12 = 17 y =
8. 1 1/2y + 16 = 19 y =
9. 4 2/5y - 17 = 13 y =
10. y ÷ 72 - 6 = 15 y =