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anonymous

  • one year ago

Solve for x. 5x-1/4=6 What value of x makes the equation true?

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  1. anonymous
    • one year ago
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    @ikram002p

  2. Astrophysics
    • one year ago
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    \[\frac{ 5x-1 }{ 4 }=6\] like this?

  3. anonymous
    • one year ago
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    yes

  4. Astrophysics
    • one year ago
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    You can cross multiply

  5. Astrophysics
    • one year ago
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    \[5x-1 = 6(4)\] now solve for x

  6. anonymous
    • one year ago
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    -19

  7. Astrophysics
    • one year ago
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    No, not quite, how did you get that?

  8. ikram002p
    • one year ago
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    is the equation like this \(\Large 5x-\frac{1}{4}=6 \) or \(\Large \frac{5x-1}{4}=6 \) ??

  9. anonymous
    • one year ago
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    the 2nd one

  10. ikram002p
    • one year ago
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    oh then gon on with @Astrophysics

  11. Astrophysics
    • one year ago
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    When doing algebra, what you do to one side you must also do to the other, and to figure out what operation to do, just do the opposite of what already exists :) So see we have 5x-1 = 20 and we want to get x on its own. So first lets get rid of the -1, to do that as I mentioned above do the opposite operation of it and then do it to both left and right side as follow

  12. Astrophysics
    • one year ago
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    |dw:1438606023527:dw| now what's next

  13. Astrophysics
    • one year ago
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    Oh sorry I put 20 in the post above when it should be 24

  14. anonymous
    • one year ago
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    you would do 24 *6?

  15. Astrophysics
    • one year ago
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    Since we have 5x=25, notice how the 5 is "attached" to the x right? So that means it's being multiplied, so what's the opposite operation of multiplication?

  16. anonymous
    • one year ago
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    divide

  17. Astrophysics
    • one year ago
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    Exactly!

  18. Astrophysics
    • one year ago
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    So now we just divide both sides by 5 :)

  19. anonymous
    • one year ago
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    i got 4.8

  20. Astrophysics
    • one year ago
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    \[5x=25 \implies x = \frac{ 25 }{ 5 }\]

  21. Astrophysics
    • one year ago
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    Remember the +1, we had to add that to the 24

  22. anonymous
    • one year ago
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    i got 5

  23. Astrophysics
    • one year ago
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    Sounds good!

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