Ibbutibbu. one year ago PLEEZ HELP ME

1. Ibbutibbu.
2. Ibbutibbu.

This is a system of inequalitites

3. Astrophysics

This is a systems of equations problem, so what sort of method do they want you to use

4. Ibbutibbu.

5. Astrophysics

|dw:1437519449700:dw|

6. Ibbutibbu.

yes ok

7. Astrophysics

I think we should get rid of fractions, as they are gross

8. Astrophysics

first

9. Astrophysics

What do you think, or do you want to use fractions

10. Ibbutibbu.

No, fractions are satan's spawn, i agree

11. Astrophysics

Alright haha, this will take longer than, ok so for both of following equations find a common denominator you may use, $\frac{ a }{ b } - \frac{ c }{ d } = \frac{ ad-bc }{ bd }$

12. Ibbutibbu.

ohhkay

13. Ibbutibbu.

12 and 6..?

14. Astrophysics

|dw:1437519673559:dw|

15. Ibbutibbu.

ok

16. Astrophysics

Now we can just move the denominators to the right side |dw:1437519727436:dw|

17. Astrophysics

Now you can do elimination easier

18. Ibbutibbu.

yes ok

19. Astrophysics

20. Ibbutibbu.

$8x-6y = 24 and -9x+6y=36?$

21. Astrophysics

Well for elimination you have to make two of the variables/ coefficients the same right, to eliminate them?

22. Ibbutibbu.

yeah

23. Ibbutibbu.

i suppose

24. Astrophysics

So try again, lets eliminate x first, so what should we multiply the top or bottom by

25. Ibbutibbu.

i alreadyh multiplied the to one my 2 ant he bottom one by -3

26. Ibbutibbu.

hmm

27. Astrophysics

Ok I worded that wrong lol ok let me show u

28. Ibbutibbu.

k

29. Astrophysics

|dw:1437520195623:dw| you see

30. Astrophysics

Now what would you get if you multiply as above, 3* first equation, 4* second equation

31. Astrophysics

It's sort of like finding the common deno

32. Ibbutibbu.

k

33. Astrophysics

k do it

34. Ibbutibbu.

12x - 9y = 36 and 12x - 8y = -48

35. Ibbutibbu.

@Astrophysics ??

36. Astrophysics

That's right but I forgot to mention you should make one of the numbers negative so we can add them and eliminate so lets just make the second equation multiplied by -4, you can tell how much i use elimination XD

37. Astrophysics

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