## randomecorner one year ago What is the solution to the equation http://static.k12.com/bank_packages/files/media/mathml_dc5a6d269fe73c1b466c16416a5e9ec78ab65965_1.gif

1. anonymous

Just get n alone

2. randomecorner

oh ok

3. randomecorner

but how?

4. anonymous

$\frac{ -2n-2 }{ 3 }=12$ First thing we're gonna do is multiply both sides by 3.

5. randomecorner

6/9=36

6. anonymous

The 3's would cancel out. You must have multipled the left side by 3/3, which actually equals 1. It should look like this$-2n-2=36$ The next step would be to add the 2 on both sides.

7. randomecorner

sorry was feeding da cat

8. randomecorner

so n=36?

9. anonymous

You tell me. If you plug 36 in for n in the original equation, will you get 12?

10. randomecorner

no nono no

11. randomecorner

gah im confused this is why i hate corefocus

12. anonymous

$-2n+(-2+2)=(36+2)$

13. randomecorner

i give up

14. anonymous

What is -2+2?

15. anonymous

What is 36+2?

16. randomecorner

38

17. randomecorner

thats a negitive so u sub the 2s

18. anonymous

What are you talking about? What is -2+2?

19. randomecorner

-4

20. randomecorner

srryi was thinking about timesing it

21. anonymous

-2+2 is the same as 2-2. 2 minus 2.

22. randomecorner

so its not negitive4? im probably drivingyou crazy sorry

23. anonymous

Does 2 minus 2 equal -4?

24. randomecorner

no its 0

25. anonymous

Then -2+2=0 as well

26. anonymous

Sooooooooo$-2n+0=38$ which is the same as$-2n=38$Now just divide both sides by -2.

27. randomecorner

32divided by -2 =-16

28. anonymous

Where did this 32 come from? We're working with a 38.

29. randomecorner

30. randomecorner

its -19

31. randomecorner

i ow u big time

32. anonymous

So $n=-19$ Now all that's left is to plug in -19 for n in the original equation and see if it matches up.

33. randomecorner

yep

34. anonymous

So that means that -19 is the answer

35. randomecorner

sorry i took a lot of time from you

36. randomecorner

and probably drove you crazy

37. anonymous

It's fine, I've spent longer.

38. randomecorner

lol wow

39. randomecorner

i think that was a hour

40. anonymous

We spent 25 minutes.

41. randomecorner

i only have a week and 3 days left of school to catch up on math witch is at 70 percent

42. randomecorner

so im gonna have ''fun''

43. randomecorner

but thank you and have a good summer