1. Algebra with Whole Numbers
Working backwards

2. Working backwards

3. Find the number I think of a number I halve it. I add 4.
The result is 7
Double 3 = 6
Subtract 4 = 3

4. Find the number I think of a number I add 3. I double it.
The result is 12
Subtract 3 = 3
Halve 12 = 6

5. Find the number I think of a number I divide by 3. I add 4.
The result is 6.
Multiply by 3 = 6
subtract 4 = 2

6. Find the number Think of a number Multiply by 3. Add 15. Divide by 3.
Subtract the original number.
The result is 5. n 3n
3n + 15
n + 5 5

7. Solve for n. 10

8. Solve for n. 15

9. Solve for n. 5

10. Solve for n. 19

11. Solve for n. 10

12. 13

14. 3 15 21 7 3

15. 2 3 1 2 6

16. 3

17. 8

18. 12

19. 3