bonjovifan03
Solve for x using the addition principle: -8+x= -24 would that be -8x=-24 which equals 3?
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cwrw238
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you add 8 to each side of the equation
-8 + x + 8 = -24 + 8
cwrw238
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what happens to the lefthand side? - what does it simplify to?
cwrw238
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-8 + 8 = ?
bonjovifan03
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16
cwrw238
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no - 8 + 8 = 8 - 8 = 0
cwrw238
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take the thermometer analogy:
|dw:1359325143283:dw|
bonjovifan03
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Sorry Im lost not good at this I need a tutor plus go back to grade school.
cwrw238
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the temperature is -8 degrees then it rises 8 degrees to give 0 degrees
8 degrees is 'added'
cwrw238
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do you see how the diagram relates to -8 + 8 = 0 ?
cwrw238
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the reason I added 8 to left side was so we would only have x left
-8 + 8 + x = 0 + x = x
bonjovifan03
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yes I understand when you do it, but get frustrated when I try to do it my self.
cwrw238
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practice simple examples and you'll gain confidence
remamber to do the same operation ( + 8) to both sides of the equation
an equation is like a balance
bonjovifan03
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OK now we have x left so then it would be X=-24+8
I will ty.
cwrw238
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right
cwrw238
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|dw:1359325718145:dw|
bonjovifan03
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so we still add 24+8 right?
cwrw238
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no we add 8 to minus 24 (-24)
check out the thermometer
cwrw238
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if we add 1 to -24 that is go up 1 degrree it gets to -23 right?
cwrw238
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and add 1 more dgree we get -22 right so what do we get to if we 8 to -24?
cwrw238
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does that help?
bonjovifan03
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so we would have -16?
bonjovifan03
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if I look at your nice graft thats what I come up with.
cwrw238
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right -16 is correct
so we get
x = -16
- though i dont think my graph is all that nice!! lol
bonjovifan03
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so do I have to figure what x is yet or is that simplified enough?
cwrw238
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no thats it x = -16
in algebra you need to get used to negative values and how to manipulate them
cwrw238
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the solution to the equation is x = -16
bonjovifan03
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I will for sure use your graft, because it makes sense to me.
bonjovifan03
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OK I hope I can get use to this yikes....
bonjovifan03
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ty for being patient with me :0) I need a drink now lol
cwrw238
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ok remember that everything below the x ( horizontal axis) is negative
also everything to left of the y-axis is negative
|dw:1359326605166:dw|
bonjovifan03
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OK ty so much...