1. Shiree19

GI bisects <DGH so that m <DGI is x-3 and m <IGH is 2x-13. Find the value of X I know the answer is x = 10; but I don't know how to get it. Please help me understand how to do it!

2. Shiree19

Here's what I have so far - x – 3 = 2x – 13 simplify = x – 3 + 3 = 2x – 13 + 3 now we have = x = 2x - 10 Now I'm stuck!

3. Shiree19

@triciaal

4. triciaal

can you draw the diagram here please

5. Shiree19

What do you mean "diagram". This problem doesn't have one....

6. triciaal

ok i'll figure it out

7. Shiree19

I'm sorry.....Thanks!

8. triciaal

|dw:1442245640582:dw|

9. triciaal

|dw:1442245802652:dw|

10. Shiree19

I still don't understand.

11. triciaal

what you have above is correct to continue put the variable on one side the number on the other

12. Shiree19

How do I remove 2x from the equation?

13. triciaal

|dw:1442246028851:dw|

14. Shiree19

Yes.

15. Shiree19

but how do I simplify that farther?

16. triciaal

|dw:1442246152631:dw|

17. triciaal

|dw:1442246200179:dw|

18. triciaal

divide each side by -1 x = 10

19. Shiree19

so I do x - 2x = 2x - 10 - 2x which equals x - 2x = 10 then I divide by -1 (where did you get the -1 from?)

20. triciaal

|dw:1442246313185:dw|

21. Shiree19

so it's x * -2x? I multiply each side by -2x? How do you make 2x negative?

22. triciaal

1x -2x = -1 x no number before the variable is understood as 1

23. Shiree19

okay. so x =1 which equals 1x.

24. triciaal

|dw:1442246412333:dw|

25. Shiree19

I have no idea what that means....

26. triciaal

x -2x subtract 1x - 2x = -1x

27. triciaal

read it again slower it shows examples that 1 is understood

28. Shiree19

okay just a min

29. Shiree19

Oh I get it! x - 2x = 1x - 2x = -1x = -x -x = -10 and two negatives = a positive so x = 10

30. triciaal

yes

31. Shiree19

Thanks so much!

32. triciaal

welcome