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bonjovifan03

  • 3 years ago

Solve for x using the addition principle: -8+x= -24 would that be -8x=-24 which equals 3?

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  1. cwrw238
    • 3 years ago
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    you add 8 to each side of the equation -8 + x + 8 = -24 + 8

  2. cwrw238
    • 3 years ago
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    what happens to the lefthand side? - what does it simplify to?

  3. cwrw238
    • 3 years ago
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    -8 + 8 = ?

  4. bonjovifan03
    • 3 years ago
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    16

  5. cwrw238
    • 3 years ago
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    no - 8 + 8 = 8 - 8 = 0

  6. cwrw238
    • 3 years ago
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    take the thermometer analogy: |dw:1359325143283:dw|

  7. bonjovifan03
    • 3 years ago
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    Sorry Im lost not good at this I need a tutor plus go back to grade school.

  8. cwrw238
    • 3 years ago
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    the temperature is -8 degrees then it rises 8 degrees to give 0 degrees 8 degrees is 'added'

  9. cwrw238
    • 3 years ago
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    do you see how the diagram relates to -8 + 8 = 0 ?

  10. cwrw238
    • 3 years ago
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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

  11. bonjovifan03
    • 3 years ago
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    yes I understand when you do it, but get frustrated when I try to do it my self.

  12. cwrw238
    • 3 years ago
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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

  13. bonjovifan03
    • 3 years ago
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    OK now we have x left so then it would be X=-24+8 I will ty.

  14. cwrw238
    • 3 years ago
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    right

  15. cwrw238
    • 3 years ago
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    |dw:1359325718145:dw|

  16. bonjovifan03
    • 3 years ago
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    so we still add 24+8 right?

  17. cwrw238
    • 3 years ago
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    no we add 8 to minus 24 (-24) check out the thermometer

  18. cwrw238
    • 3 years ago
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    if we add 1 to -24 that is go up 1 degrree it gets to -23 right?

  19. cwrw238
    • 3 years ago
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    and add 1 more dgree we get -22 right so what do we get to if we 8 to -24?

  20. cwrw238
    • 3 years ago
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    does that help?

  21. bonjovifan03
    • 3 years ago
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    so we would have -16?

  22. bonjovifan03
    • 3 years ago
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    if I look at your nice graft thats what I come up with.

  23. cwrw238
    • 3 years ago
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    right -16 is correct so we get x = -16 - though i dont think my graph is all that nice!! lol

  24. bonjovifan03
    • 3 years ago
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    so do I have to figure what x is yet or is that simplified enough?

  25. cwrw238
    • 3 years ago
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    no thats it x = -16 in algebra you need to get used to negative values and how to manipulate them

  26. cwrw238
    • 3 years ago
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    the solution to the equation is x = -16

  27. bonjovifan03
    • 3 years ago
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    I will for sure use your graft, because it makes sense to me.

  28. bonjovifan03
    • 3 years ago
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    OK I hope I can get use to this yikes....

  29. bonjovifan03
    • 3 years ago
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    ty for being patient with me :0) I need a drink now lol

  30. cwrw238
    • 3 years ago
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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|

  31. bonjovifan03
    • 3 years ago
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    OK ty so much...

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