Word problems: a plant grows each week

Write an equation for the situation, then solve it.

1. A plant is 12 cm tall and grows 2 cm each week. After how many weeks is it 24 cm tall?
2. A plant is 10 cm tall and grows 2 cm each week. After how many weeks is it 32 cm tall?
3. A plant is 11 cm tall and grows 4 cm each week. After how many weeks is it 31 cm tall?
4. A plant is 4 cm tall and grows 5 cm each week. After how many weeks is it 34 cm tall?
5. A plant is 10 cm tall and grows 5 cm each week. After how many weeks is it 80 cm tall?
6. A plant is 6 cm tall and grows 7 cm each week. After how many weeks is it 83 cm tall?
7. A plant is 14 cm tall and grows 4 cm each week. After how many weeks is it 22 cm tall?
8. A plant is 5 cm tall and grows 4 cm each week. After how many weeks is it 61 cm tall?
9. A plant is 14 cm tall and grows 2 cm each week. After how many weeks is it 48 cm tall?
10. A plant is 30 cm tall and grows 9 cm each week. After how many weeks is it 192 cm tall?
11. A plant is 2 cm tall and grows 4 cm each week. After how many weeks is it 34 cm tall?
12. A plant is 35 cm tall and grows 8 cm each week. After how many weeks is it 147 cm tall?
13. A plant is 21 cm tall and grows 15 cm each week. After how many weeks is it 351 cm tall?
14. A plant is 13 cm tall and grows 13 cm each week. After how many weeks is it 273 cm tall?
15. A plant is 37 cm tall and grows 4 cm each week. After how many weeks is it 109 cm tall?
16. A plant is 15 cm tall and grows 4 cm each week. After how many weeks is it 59 cm tall?
17. A plant is 15 cm tall and grows 12 cm each week. After how many weeks is it 87 cm tall?
18. A plant is 46 cm tall and grows 2 cm each week. After how many weeks is it 68 cm tall?
19. A plant is 25 cm tall and grows 12 cm each week. After how many weeks is it 85 cm tall?
20. A plant is 9 cm tall and grows 4 cm each week. After how many weeks is it 65 cm tall?