## anonymous one year ago Solve for x: 4 over 5 x + 4 over 3 = 2x x = __________________ Write your answer as a fraction in simplest form. Use the "/" symbol for the fraction bar.

1. anonymous

halp

2. anonymous

like this?$\frac{ 4 }{ 5x } +\frac{ 4 }{ 3 } = 2x$

3. anonymous

I guess, it says solve for x

4. anonymous

i know solve for x, but we need to get the equations right first

5. anonymous

oh right lol, sorry im like so out of it when it comes to math Its x=4/5 x + 4/3 = 2x

6. anonymous

the x is separate

7. anonymous

ok lets multiply by 3 on both sides to remove the denominator on the 4/3

8. anonymous

$(3)\frac{ 4 }{ 5x } + (3) \frac{ 4 }{ 3 } = (3)2x$

9. anonymous

2.4 x + 4 =6x is that right?

10. anonymous

where did you get the 2.4x?

11. anonymous

3 times 4/5

12. anonymous

its 3 times 4/5x

13. anonymous

12/5x you cant just pull the x out

14. anonymous

i told you that the x was separate though

15. anonymous

$\frac{ 4 }{ 5 }x$

16. anonymous

like this?

17. anonymous

ye

18. anonymous

$2.4x + 4 = 2x$ now minus 2x from both sides

19. anonymous

0.4x + 2x

20. anonymous

or 0.4 + 2x = 2x

21. anonymous

$2.4x + 4 -2x = 2x - 2x$

22. anonymous

so would 2x -2x or just 2x be the answer..?

23. anonymous

solve that chunk first

24. anonymous

2x-2x is definitely 0

25. anonymous

XD ye ik i got 4.4?

26. anonymous

2.4x-2x =?

27. anonymous

well that would be 0.4 but i added the 4 cuz u said it up there

28. anonymous

its 2.4x + 4

29. anonymous

not 2.4x +4x

30. anonymous

you can't add the variables and the constants together

31. anonymous

ok then 6.4?

32. UsukiDoll

"you can't add the variables and the constants together " leave it as 2.4x + 4

33. anonymous

2.4x + 4

34. anonymous

2.4 is a coefficient not a constant term

35. anonymous

so we now have $0.4x + 4 = 0$

36. anonymous

so that would be the final answer?

37. UsukiDoll

ick decimals... I would multiply the whole equation by 10 and then solve for x

38. anonymous

yes multiply by 10

39. UsukiDoll

decimals are evil. we use multiplication to modify the equation and make life easier.

40. anonymous

hint: calculator doesn't care about decimals

41. anonymous

42. UsukiDoll

ghostbusters.

43. anonymous

you seen the goat balls yet?

44. UsukiDoll

ya ._,

45. anonymous

lel

46. anonymous

Um...so the answer is..0.4x + 4 = 0 also, goat...wtf...

47. anonymous

correct?

48. UsukiDoll

gotta solve for x =_= that's just an equation

49. anonymous

50. anonymous

show it to him if he didn't finish it in 10mins

51. UsukiDoll

k/

52. UsukiDoll

so first we multiply the entire equation by 10 because dealing with decimals (especially by hand) is torture 0.4x + 4 = 0 (10)(0.4x)+4(10)=0(10) 4x+40=0 now we need x by itself. We don't want that 40 on the left side, so subtract 40 on both sides finally divide both sides by 4

53. anonymous

$4x + 40 =0$$x + 10 -10 = 0 - 10$