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    mott12586's Avatar
    mott12586 Posts: 3, Reputation: 1
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    #1

    Jan 15, 2011, 04:22 AM
    Need help answering.
    -(5x + 2y + 8) =?

    I thought the answer was -15xy but I do not think it is correct.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jan 16, 2011, 12:42 AM

    May you tell us what is the actual question?

    I mean, what do you have to do?
    Do you need to graph the equation? (Not likely)
    Do you need to make y the subject of formula? Or x?
    Do you need to simplify this?

    Note that you cannot solve for x and y because there are infinite solutions. (You cannot solve for 2 variables with only one equation)
    mott12586's Avatar
    mott12586 Posts: 3, Reputation: 1
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    #3

    Jan 16, 2011, 05:31 PM
    On the assignment is said Perform the indicated operations on this equation

    – (5x +2y + 8)

    I have no idea how to solve the equation.

    Thanks for your help.
    r0manticr0se's Avatar
    r0manticr0se Posts: 3, Reputation: 2
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    #4

    Jan 16, 2011, 09:32 PM
    As far as I can see the only thing that can be done is this:

    -(5x +2y + 8)=
    -5x-2y-8=
    -5x-2y=8 (*-)
    5x+2y=-8
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Jan 17, 2011, 01:22 AM

    Are the values of x and y maybe given?

    If so, just replace the values of x and y in the expression and simplify.

    If not, you can only expand the brackets.

    -(5x + 2y + 8) = -5x - 2y - 8
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