1. anonymous

2. anonymous

@pooja195 :)

3. pooja195

@sammixboo

4. anonymous

@Nnesha

5. Nnesha

why do you think it's C ??

6. anonymous

Accidentally clicked on it, didn't mean to

7. Nnesha

i mean B which is step 3

8. Nnesha

so that was a guess ?

9. anonymous

Yeah I guess, I didn't really mean to click on it

10. anonymous

Is it right? lol

11. Nnesha

i need explanation why did you pick ? and bec u that was an educated guess let's start it ovr

12. anonymous

Yeah I didnt evem mean to click on it, lets pretend i didnt click on that answer haha

13. Nnesha

elimination process to isolate one variable you need to cross out 2nd variable to do that you need opposite sign with same number :=)

14. Nnesha

so that's how multiply first equation by -2

15. Nnesha

|dw:1434568328568:dw| multiply both sides by -2 let me know what you get :=)

16. anonymous

4m =4 n+b?

17. anonymous

-2 times -2 is -4

18. Nnesha

b how did you get b ?? -2(n+6) multiply everything which is inside the parentheses by outside term

19. Nnesha

for example a(b+c) = a times b +a times c :=)

20. anonymous

Gah, I dont know! :(

21. Nnesha

-2 times n = ? -2 times 6 = ?

22. anonymous

-2 times 6 = -12

23. anonymous

-2 times n = -2?

24. Nnesha

n can be written as 1n so multiply the coefficients -2 times 1n = -2n

25. Nnesha

now step is right or na ?

26. Nnesha

now step 2 is right or na ?

27. anonymous

right

28. anonymous

i mean wrong

29. anonymous

Let me look at it for a sec lol

30. Nnesha

okay

31. anonymous

Step 2 is wrong

32. Nnesha

how is it wrong ?

33. anonymous

step 2 is right

34. Nnesha

yes |dw:1434568814335:dw| now combine like terms

35. anonymous

Gah, algebra is NOT my best class

36. Nnesha

|dw:1434569003073:dw| COmbine like terms

37. Nnesha

just practice :=)

38. anonymous

2m = 10n 2m = 16n

39. anonymous

and so m equals 5 in the first equation and m equals 8 in the second?

40. Nnesha

|dw:1434569117690:dw| combine them -2m and 2m are like terms so -2m +2m = ?

41. anonymous

0

42. anonymous

they cancel eachother

43. Nnesha

yes right !

44. anonymous

:D

45. Nnesha

|dw:1434569214780:dw| now combine these one

46. Nnesha

and why is it wrong ?

47. anonymous

14n 16n

48. anonymous

Never mind about the step 3 is wrong lol

49. Nnesha

it's okay tell me why do you think it's wrong ?

50. anonymous

Step 4 is wrong, because it should be 10n and 16n!

51. anonymous

they wrote −20 = 10n

52. Nnesha

combine like terms meaning add coefficient of same variable examples 2+6 are like terms both numbers are constant(without any variable ) 2x+3x are like terms bec variables are same

53. Nnesha

we are still on step 3 :=)

54. Nnesha

|dw:1434569457564:dw|