## AngelLeigh-Anne 3 years ago I really need some help, I have a headake and forgot how to solve for X please help me. :((

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1. jazy

Do you have a specific problem you need to solve? I can go step by step and help you through it.

2. AngelLeigh-Anne

4x-31 on one side and 2x+19 on the other solve for x

3. myininaya

So we have this: 4x-31 = 2x+19 Get your terms that have factor x on one side All other terms, your constant terms, on the other side

4. ParthKohli

Let's make up an equation and I'd solve it for you:\begin{aligned}6x + 3&=9x - 1\\6x&=9x - 1 - 3\\ 6x&=9x-4\\6x - 9x&=-4\\ -3x&=-4\\ x &={4 \over 3} \end{aligned}

5. AngelLeigh-Anne

25?

6. myininaya

How about we have some interaction which includes the user asking here to solve for x?

7. myininaya

So we have 4x-31=2x+19 Do you know how to put your x terms together and your constant terms together? You need to do this by adding/subtracting terms from both sides.

8. AngelLeigh-Anne

Okay thanks, I'll post another prolbem, it's really complex and I haven't seen it before

9. AngelLeigh-Anne

|dw:1350653573213:dw|

10. AngelLeigh-Anne

If If m ∠ 3 = 104˚, what is m ∠ 8?

11. ParthKohli

Hint: use corresponding angles identity, then find a linear pair.

12. AngelLeigh-Anne

< 2, 3, 6,7 are the same?

13. ParthKohli

No... first use $$\angle 3 = \angle 7$$.

14. AngelLeigh-Anne

Sorry forgot how to do this >.<

15. ParthKohli

Then notice that you have a linear pair, so $$\angle 7$$ and $$\angle 8$$ are supplementary.

16. AngelLeigh-Anne

So they all equal 104?

17. ParthKohli

Hmm, do you know what these are? 1) Corresponding angles 2) Alternate interior angles 3) Linear pair 4) Opposite angles

18. AngelLeigh-Anne

Yeah I'm a sinor, but I forgot it's been like a year since I was in math

19. jazy

|dw:1350654095713:dw|

20. AngelLeigh-Anne

Ohhhh

21. AngelLeigh-Anne

Um. So it's not 104

22. AngelLeigh-Anne

it's 94?

23. AngelLeigh-Anne

>.<

24. jazy

|dw:1350654253156:dw|

25. AngelLeigh-Anne

<2 is going to measure the same as <8

26. AngelLeigh-Anne

half of 180 is 90, but that's not an answer choise

27. jazy

Yes. <2 is the same as 8. They give you angle 3, 104 degrees. What other angles are the same as angle 3?

28. jazy

*the same as <8

29. AngelLeigh-Anne

<2

30. ParthKohli

<3

31. jazy

No, angle 2 and 3 are supplementary. Added up they equal 180 degrees. |dw:1350654491698:dw|

32. AngelLeigh-Anne

so they are all 104

33. jazy

No, angles 3, 1, 5, 7 are all corresponding. So if angle 3 is 104 degrees, then so are 1,5,7. Do you understand? Angles 2, 4, 6, 8 are also corresponding to each other.

34. AngelLeigh-Anne

Yeah I understand but how to I find out how much the other angles are

35. jazy

Supplementary angles form 180 degrees. A straight equals 180 degrees. |dw:1350654810017:dw|

36. jazy

So 104 + ? = 180

37. AngelLeigh-Anne

I got my test wrong anyways. Sorry, thanks for the help

38. jazy

Sorry to hear that. ):