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# Message Board for PlayStation 2 version

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yosup  posted on Mar 11, 2009 5:03:47 PM - Report post

quote:

quote:
originally posted by yosup

It's a surprising change that I'm doing my homework.
Would some math wizard/anyone who passed Grade 9 Mathematics answer me this?

Have I done this question right?

3x - (x + 4) = -x + 8
3x - 4x = -x + 8
3x - 4x + x = 8
x = 8

[Edited by yosup, 3/11/2009 4:37:07 PM]

Nope.
The second step, you multiplied x and 4. You should have added.

Should look like this.

3x - (x + 4) = -x + 8
-(x + 4) = -4x + 8
-x - 4 = -4x + 8
-4 = -3x + 8
3x = 12

x = 4

Ah, yes.
I knew I was missing something.

Darkish  posted on Mar 11, 2009 5:04:02 PM - Report post

RETIRED MOD
Even so...4x - 4x = 8 has no solution...soooo

Serivor  posted on Mar 11, 2009 5:33:52 PM - Report post

ELITE
I don't like the way you did that Thrawn.
>_>

AdmiralThrawn  posted on Mar 11, 2009 5:34:48 PM - Report post

CRAHSYSTOR
quote:
originally posted by Serivor

I don't like the way you did that Thrawn.
>_>

I can't help it.

Serivor  posted on Mar 11, 2009 5:39:12 PM - Report post

ELITE
I set mine up this way:

3x - (x + 4) = -x + 8
3x - x - 4 = -x + 8
2x - 4 = -x + 8
3x = 12
x = 4

Dhampy  posted on Mar 11, 2009 5:52:51 PM - Report post

ELITE
quote:
originally posted by Serivor

I set mine up this way:

3x - (x + 4) = -x + 8
3x - x - 4 = -x + 8
2x - 4 = -x + 8
3x = 12
x = 4

I'm no expert at math, but that looks correct to me.

AdmiralThrawn  posted on Mar 11, 2009 5:53:39 PM - Report post

CRAHSYSTOR
Dey bee teh same t'ing in dee end.

Serivor  posted on Mar 11, 2009 5:53:58 PM - Report post

ELITE
Thrawn's way is correct as well, but I just prefer the way I set mine up over his. I think it's more user friendly to read.
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