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Math Help - need help w/ calculation using 2 variables

  1. #1
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    Unhappy need help w/ calculation using 2 variables

    Math was never my strong subject and no matter how hard I think I cannot wrap my little brain around this...

    So, here's the problem:

    5870621 = x + y

    where y is 15% of x

    I need to know what both x and y are...

    HELP!
    Thank you!
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  2. #2
    Member Henderson's Avatar
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    Take the sentence "y is 15% of x" and think of it as an equation:

    y = .15 * x

    Knowing that, we can put '.15x' in anywhere we see a 'y'.

    Rather than 5870621 = x + y, we'll say

    5870621 = x + .15x, so combine like terms for:

    5870621 = 1.15x.


    Do you see where to go from here?
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  3. #3
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    YEY! I think....

    5870621 / 1.15 = x

    so x = 5104887.83

    ..is that right?
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  4. #4
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    Quote Originally Posted by PoohJoon View Post
    YEY! I think....

    5870621 / 1.15 = x

    so x = 5104887.83

    ..is that right?
    correct:
    5104887.83
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  5. #5
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    Thank you for your help!!!
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