1. 1 copyright © Creative Smarts Inc. GregTangMath.com October 21, 2015 GregTangMath.com gregtang@gregtang.com

2. 2 copyright © Creative Smarts Inc. GregTangMath.com 4 = – 8

3. 3 copyright © Creative Smarts Inc. GregTangMath.com 12–4=8

4. 4 copyright © Creative Smarts Inc. GregTangMath.com 12– 4=8

5. 5 copyright © Creative Smarts Inc. GregTangMath.com 12– 4=8

6. 6 copyright © Creative Smarts Inc. GregTangMath.com 12– 4=8 4+8= 8

7. 7 copyright © Creative Smarts Inc. GregTangMath.com ?–4=8?–4=8

8. 8 copyright © Creative Smarts Inc. GregTangMath.com ? ?–4=8?–4=8

9. 9 copyright © Creative Smarts Inc. GregTangMath.com ? 4 ?–4=8?–4=8

10. 10 copyright © Creative Smarts Inc. GregTangMath.com ? 48 ?–4=8?–4=8

11. 11 copyright © Creative Smarts Inc. GregTangMath.com ? 48 ?–4=8?–4=8 4+8=?

12. 12 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28

13. 13 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28-4

14. 14 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28-4 3x=24

15. 15 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28-4 3x=243

16. 16 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28-4 3x=243 x=8

17. 17 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28

18. 18 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28

19. 19 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28

20. 20 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28 x=8

21. 21 copyright © Creative Smarts Inc. GregTangMath.com 3x+4 = 28

22. 22 copyright © Creative Smarts Inc. GregTangMath.com X + Y = 22 Y + Z = 27 Z + X = 25

23. 23 copyright © Creative Smarts Inc. GregTangMath.com October 21, 2015 GregTangMath.com gregtang@gregtang.com