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Panda223RulerZ

  • 3 years ago

- 1/2 x + 2 = x + 7 I still dont understand how to do it

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  1. SchoolSlacker
    • 3 years ago
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    how to do what?

  2. SchoolSlacker
    • 3 years ago
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    whats the question?

  3. Panda223RulerZ
    • 3 years ago
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    - 1/2 x + 2 = x + 7

  4. robert1
    • 3 years ago
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    x==-10/3

  5. Panda223RulerZ
    • 3 years ago
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    How did you get to that answer?

  6. Panda223RulerZ
    • 3 years ago
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    I want to learn it, not just get answers haha

  7. radar
    • 3 years ago
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    Follow the "golden rule" of algebra. Thou shalt do to one side of the equal sign as thou do to the other side.

  8. radar
    • 3 years ago
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    In this case subtract x. You now have -1.5x + 2 = 7 Do you see why?

  9. Panda223RulerZ
    • 3 years ago
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    Yeah

  10. radar
    • 3 years ago
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    Continuing, now subtract 2. You now have: -1.5x= 5 Again did you follow?

  11. jiteshmeghwal9
    • 3 years ago
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    \[\Huge{\frac{1}{2}x+2=x+7}\]\[\Huge{\frac{x+2}{2}=\frac{x+7}{1}}\]By cross multiplication we have,\[\Huge{(x+2)=2(x+7)}\]Solve this for \(x\).

  12. Panda223RulerZ
    • 3 years ago
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    Yes

  13. radar
    • 3 years ago
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    I think you are on track. We only now have to do is divide by -1.5 We now have x = -(5/1.5) Using calculator divide 5 by 1.5 and prefix the minus sign.

  14. jiteshmeghwal9
    • 3 years ago
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    |dw:1352384148089:dw|

  15. radar
    • 3 years ago
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    This gives an odd ball answer of 3.33333

  16. jiteshmeghwal9
    • 3 years ago
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    After getting the value u just need t put minus before the digit :)

  17. radar
    • 3 years ago
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    or I should say -3.333 but it needs to be checked out by substituting it in the original problem to be sure we have not erred. To err is human.

  18. radar
    • 3 years ago
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    The original equation was: - 1/2 x + 2 = x + 7 lets call the answer -3 1/3 and substitute it in the original. we would have: -1/2 (-3 1/3) +2 = -3 1/3 + 7 (-1/2)(-10/3) + 2= 3 2/3 10/6 + 2 = 3 2/3 5/3 + 2 = 3 2/3 3 2/3 = 3 2/3 verified!

  19. radar
    • 3 years ago
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    Did following that help, just remember the golden rule and you won't unbalance the equation. When you unbalance the equation it will result in an incorrect answer.

  20. radar
    • 3 years ago
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    This is my input for this morning. Good luck with your studies.

  21. Panda223RulerZ
    • 3 years ago
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    Thank you so much, and thank you for serving in the Army(:

  22. radar
    • 3 years ago
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    No problem and as I saId good luck with your studies. Don't be discouraged when faced with a difficult problem, accept the challenge and try and solve.

  23. radar
    • 3 years ago
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    Oh yes, your flag does not offend me.

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