Vunro
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| Joined: 24 Oct 2009 |
| Total Posts: 18204 |
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| 29 Sep 2011 09:04 PM |
this might be easy but im stuck on them
7 - 5x = 10 - (6x+7)
-(a+3) = -2(2a+1) - 7 |
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Vunro
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| Joined: 24 Oct 2009 |
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Storm980
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| Joined: 08 Aug 2010 |
| Total Posts: 10857 |
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| 29 Sep 2011 09:06 PM |
TACO!
~The Official Super Moose of OT~ |
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Vunro
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| Joined: 24 Oct 2009 |
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| 29 Sep 2011 09:07 PM |
| Now I'm starting to think Sierra is smarter than all of you. |
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| 29 Sep 2011 09:08 PM |
| just distribute then move the variable to one side. |
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| 29 Sep 2011 09:08 PM |
i dont know what alegebra is
i feel stupid
:I |
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Vunro
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| Joined: 24 Oct 2009 |
| Total Posts: 18204 |
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| 29 Sep 2011 09:09 PM |
@dawoof
How am I suppose to do that with the first one? |
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LLegomman
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| Joined: 07 Dec 2010 |
| Total Posts: 2522 |
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| 29 Sep 2011 09:09 PM |
7-5x=10-(6x+7)
7-5x=10-6x-7
7+11x=10-7
7+11x=3
11x=-4
11x/11x=-4/11
.36363636363...
Rounded= -.37
Sorry if I'm wrong. :/ |
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| 29 Sep 2011 09:10 PM |
Distribute property right? I think... |
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| 29 Sep 2011 09:10 PM |
see, both me and kickmecookies agree its 97.5 |
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| 29 Sep 2011 09:11 PM |
| I never was good at maths. :( |
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| 29 Sep 2011 09:11 PM |
7 - 5x = 10 - (6x+7)
For this one, you distribute the negative on the right side I believe: 7-5x=10-6x-7 Add 6x to both side 7+1x=10-7 7+1x=3 -7 on both sides 1x=3 x=3
-(a+3) = -2(2a+1) - 7
Distribute negative on left side and distribute -2 on right side. -a-3=-4a-2-7 -a-3=-4a-9 Add 4a on both sides 3a-3=-9 add 3 to both sides 3a=-6 divide by 3 a=-3 |
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| 29 Sep 2011 09:12 PM |
| Sorry for the second on it's -2. |
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| 29 Sep 2011 09:12 PM |
7 - 5x = 10 - (6x+7)
-(a+3) = -2(2a+1) - 7
1.
7-5x = 10 - (6x+7) -2x = 60x-70 -2x = -10x /2 /2
x=-5
2. -(a+3) = -2(2a+1) - 7 -(a+3) = -4a -2 -7 -3a = 13a
Just leave it like that |
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| 29 Sep 2011 09:12 PM |
| In the first one think of a negative one in front of the parenthesis. |
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