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    tennis14's Avatar
    tennis14 Posts: 1, Reputation: 1
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    #1

    Mar 16, 2010, 02:00 PM
    5k+18= -7
    I don't know what K is. Do you?
    rpray2007's Avatar
    rpray2007 Posts: 319, Reputation: 23
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    #2

    Mar 16, 2010, 03:08 PM

    if you want to find the value of K you have to isolate the value by doing operations on both side of the equation. It's a simple problem so you have to try a little harder. One hint - K is negative.
    OSUfan101's Avatar
    OSUfan101 Posts: 12, Reputation: 2
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    #3

    Apr 6, 2010, 10:58 AM

    K is the variable.

    5k + 18 = -7
    -18 -18 [add negative plus a negative]

    \5k = -25/ [negative divided by a positive = a negative]
    5 5
    ___________
    k = -5

    **to check your answer place the -5 where the variable k is. Let's do it together.

    5(-5)+ 18 =-7 [remember your order of operations.
    1.) parenthesis
    2.) exponents
    3.) mulitiply
    4.) divide
    5.) add
    6.) subtract
    **to remember: the first letter in each word is
    PEMDAS <that's how I remember.

    -25 + 18 = -7 [-25 + 18 = -7]

    -7 = -7

    Now you know you're correct!

    Hope this helped!

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