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Anonymous
Anonymous asked in Science & MathematicsMathematics · 10 years ago

Algebra 1 question, probably easy (URGENT!!!!!!)?

I am studying for my algebra test tomorrow. I thought I had this section perfected, but I decided to do one more problem, and BAM, I have problems with it.

It's -2/5p + 2 = 1/5p + 11

The #/#p's are fractions btw

So my question is which side do you use as like your main one? Like I didn't know if I should subtract 2 from 11, or subtract 11 from 2, etc. So should i start with the 1/5p side or the -2/5p side, how do I know which side to start from in any equation?

Also, please do the problem and show steps? Please, your helping a troubled 13 year old get through his math test (and I still have 2 other tests to study for tomorrow, so please help!!!)

7 Answers

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  • Anonymous
    10 years ago
    Favorite Answer

    You move the ps to one side, and the numbers to the other :)

    -2/5p - 1/5p = 11 - 2

    -3/5p = 9

    -3 = 45p

    p = -15

    I hope this helps. :)

  • 10 years ago

    It doesn't matter which side you start with, but many math teacher like to keep the variables on the left.

    First, you'd subtract 1/5p from both sides to get -3/5p+2=11, then subtract 2 from both sides to get -3/5p=9. Divide both sides by -3/5 or multiply by -5/3 to get

    p=-15.

    Hope this helped :D Good luck!

  • ?
    Lv 7
    10 years ago

    You can go either way

    First I'll move the p's to the left

    -2/5p + 2 = 1/5p + 11

    -2/5p - 1/5p = 11 - 2

    -3/5p = 9

    p = 9 * (-5/3) = -45/3 = -15

    Now I'll move the p's to the right

    -2/5p + 2 = 1/5p + 11

    2 - 11 = 1/5p + 2/5p

    -9 = 3/5p

    p = -9 * 5/3 = -45/3 = -15

    See, it works either way!!

  • 10 years ago

    I would do it like this.

    -2/5p +2 = 1/5p+11

    minus 1/5p both sides

    -3/5p+2 = 11

    minus 2 both sides

    -3/5p = 9

    divide both sides by -3/5

    p = -15

    now i would check by putting -15 in for p use parenthesis () when substituting.

    I checked it on my calculator and it all works out p = -15

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  • 10 years ago

    -2/5p + 2 = 1/5p + 11

    2 = (3/5)p + 11 {added (2/5)p to both sides}

    -9 = (3/5)p {subtracted 11 from both sides}

    p = -15 {divided both sides by 3/5, multiplying by reciprocal, 5/3}

    http://www.algebrahouse.com/

  • Anonymous
    10 years ago

    Is it (-2/5)p or -2/(5p)? Same thing with the other one. Is it (1/5)p or 1/(5p)? Are the p's in the denominator?

  • 10 years ago

    JUST MULTIPLY BY 5 BOTH SIDES

    -2p + 10 = p + 55

    3p = -45

    p = -15 ANSWER

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