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 yosup send PM view profile add to friends User #: 67880 Posts: 7171 Joined: May 02, 2005 Last visit: Mar 26, 2015
 Posted: Mar 11, 2009 5:03:47 PM - Report post (0) (0) post reply

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 + 83x - 4x = -x + 83x - 4x + x = 8x = 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.

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 Darkish send PM view profile add to friends User #: 136681 Posts: 14334 Joined: May 13, 2006 Last visit: Mar 27, 2015
 Posted: Mar 11, 2009 5:04:02 PM - Report post (0) (0) post reply
 Even so...4x - 4x = 8 has no solution...soooo
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 Serivor send PM view profile add to friends User #: 86617 Posts: 5875 Joined: Sep 26, 2005 Last visit: Mar 02, 2015
 Posted: Mar 11, 2009 5:33:52 PM - Report post (0) (0) post reply
 I don't like the way you did that Thrawn.>_>
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 AdmiralThrawn send PM view profile add to friends User #: 171404 Posts: 3301 Joined: Oct 29, 2006 Last visit: Dec 02, 2014
 Posted: Mar 11, 2009 5:34:48 PM - Report post (0) (0) post reply

 quote: originally posted by Serivor:I don't like the way you did that Thrawn.>_>

I can't help it.

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 Serivor send PM view profile add to friends User #: 86617 Posts: 5875 Joined: Sep 26, 2005 Last visit: Mar 02, 2015
 Posted: Mar 11, 2009 5:39:12 PM - Report post (0) (0) post reply
 I set mine up this way:3x - (x + 4) = -x + 83x - x - 4 = -x + 82x - 4 = -x + 83x = 12x = 4
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 Dhampy send PM view profile add to friends User #: 447286 Posts: 1326 Joined: May 14, 2008 Last visit: Mar 25, 2015
 Posted: Mar 11, 2009 5:52:51 PM - Report post (0) (0) post reply

 quote: originally posted by Serivor:I set mine up this way:3x - (x + 4) = -x + 83x - x - 4 = -x + 82x - 4 = -x + 83x = 12x = 4

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

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 AdmiralThrawn send PM view profile add to friends User #: 171404 Posts: 3301 Joined: Oct 29, 2006 Last visit: Dec 02, 2014
 Posted: Mar 11, 2009 5:53:39 PM - Report post (0) (0) post reply
 Dey bee teh same t'ing in dee end.
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 Serivor send PM view profile add to friends User #: 86617 Posts: 5875 Joined: Sep 26, 2005 Last visit: Mar 02, 2015
 Posted: Mar 11, 2009 5:53:58 PM - Report post (0) (0) post reply
 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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