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anonymous

  • one year ago

Solve for x. Express the answer in simplest form. http://static.k12.com/bank_packages/files/media/mathml_2366bbd478fbe81c6704b0bedb20548628636baa_1.gif

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  1. anonymous
    • one year ago
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    @Hayleymeyer

  2. anonymous
    • one year ago
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    We would cross multiply in this.

  3. Hayleymeyer
    • one year ago
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    :), so what do you think it is?

  4. anonymous
    • one year ago
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    Do you know how to cross multiply?

  5. anonymous
    • one year ago
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    so 1 x 3 and 3 x 7, since 4x - 1 is 3

  6. anonymous
    • one year ago
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    Well it would be \[\large 3 \times 7~=~ 1 \times (4x-1)\]

  7. anonymous
    • one year ago
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    Oh alright, so what is the next step, I'm not very good at math ://

  8. anonymous
    • one year ago
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    I learned some of this in 8th but then i had to take 7th grade math over again

  9. anonymous
    • one year ago
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    Well we're gonna simplify and then get x alone.

  10. anonymous
    • one year ago
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    \[\large 21~=~4x-1\] Now we gotta get x alone

  11. anonymous
    • one year ago
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    How do we do that, just take the x out?

  12. anonymous
    • one year ago
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    Well first is to get the 1 to the other side. Since it's currently a negative on the right side, we'll add it on both sides. What will that look like?

  13. anonymous
    • one year ago
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    21 = 4x -1 +1 +1

  14. anonymous
    • one year ago
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    Which would be...

  15. anonymous
    • one year ago
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    22 = 5x

  16. anonymous
    • one year ago
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    The ones would cancel out. You can't add a normal integer to an integer that's multiplied by a value. It would look like this \[\large 22~=~4x\] Now just divide the 4 on both sides to get the x alone.

  17. anonymous
    • one year ago
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    22 / 4 = 5.5

  18. anonymous
    • one year ago
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    and 4 / 4 = 1

  19. anonymous
    • one year ago
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    Correct! Good job :) So \[\large 5.5~=~x\] which will be our answer :)

  20. anonymous
    • one year ago
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    Well, the answer shows that it has to be a fraction on my schools website :/

  21. anonymous
    • one year ago
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    Then just convert .5 to fraction form. Or keep it as 22/4.

  22. anonymous
    • one year ago
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    Alright, thank you for your help :-)

  23. anonymous
    • one year ago
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    \[\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile \]

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