# help me with this math thing Created 6 years ago2013-10-12 14:41:57 UTC by ninja defuse

Created 6 years ago2013-10-12 14:41:57 UTC by

Posted 6 years ago2013-10-12 14:41:57 UTC Post #316202
Posted 6 years ago2013-10-12 14:53:29 UTC Post #316203
Posted 6 years ago2013-10-12 15:31:53 UTC Post #316204
Both expressions are equal to Y, so set them equal to each other and solve for x.

Set both equations equal to each other:
2x + 2 = -(1/3)x + 2(2/3)

Collect the x's on one side, and the constants on the other. To keep the equation equal, if you subtract or add something from/to one side of the equation you have to do it to the other:
2x + (1/3)x = 2(2/3) - 2

Multiply out the 2(2/3):
2x + (1/3)x = (4/3) - 2

Re-express everything in terms of thirds so we can add/subtract them easily.
(6/3)x + (1/3)x = (4/3) - (6/3)

(7/3)x = -(2/3)

Divide both sides of the equation by 7/3 to get x:
x = -(2/7)
Posted 6 years ago2013-10-12 16:01:24 UTC Post #316205
yeye i have just made it somehow 10 minutes ago.. thx for help and tips anyway <3

can u help me doing this in graphic mode?
Posted 6 years ago2013-10-12 16:10:45 UTC Post #316206
What do you mean graphic mode?

If you mean to do this problem graphically, just plot both lines on a grid and then mark the x value that the two lines meet up at.

Edit: Also, careful! I don't think your work makes sense! Plug your results back into the original equations and see if they equal each other.
Posted 6 years ago2013-10-12 16:16:54 UTC Post #316207
i think its OK i hope...
Posted 6 years ago2013-10-13 02:21:17 UTC Post #316211
lol MSPaint.
RimrookGoldsource Guru
Posted 6 years ago2013-10-13 07:47:06 UTC Post #316212
@up
Gimp
Posted 6 years ago2013-10-13 08:27:35 UTC Post #316213
You must be in your early high-school years ninja?

I know everything seems hard at first. But trust me, those are the easy stuff :). Try KhanAcademy, it's a good source of math tutorials. Although they usually tackle the easy stuff when it comes to uni math.
StrikerI forgot to check the oil pressure
Posted 6 years ago2013-10-13 14:33:10 UTC Post #316216
well i have to refresh my knownledge from past...
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