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Math Help - Algebra 1 question

  1. #1
    Newbie
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    Algebra 1 question

    Please solve:

    mx+7nx=7
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  2. #2
    MHF Contributor Amer's Avatar
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    Re: Algebra 1 question

    solve for x
    first factor x

    x(m + 7n) = 7

    divide both sides by (m+7n) to get

    x = \frac{7}{m+7n}
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  3. #3
    Newbie mathland's Avatar
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    Bronx, New York
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    Re: Algebra 1 question

    Quote Originally Posted by ingyaningya View Post
    Please solve:

    mx+7nx=7
    You did not state which variable we are solving for but like Amer, I will assume it is for x.


    We first factor out an x and then we divide every term by x.

    So, mx divided by x = m.

    Then 7nx divided by x = 7n.

    We now divide both sides of the equation by (m + 7n).

    Final answer: x = 7/(m + 7n).


    By the way, you can also write the final answer as x = 7/(7n + m).


    Just in case you are looking to solve for n, this is how it is done.

    mx+7nx=7

    Subtract mx from both sides.

    7nx = 7 - mx

    Now divide both sides by 7x.

    n = (7 - mx)/7x


    Remember, the first reply is correct but I just wanted to show you what to do should you need to solve for n in this example.
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