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

    Apr 22, 2008, 10:43 PM
    Finding X in an equation
    A friend of mine is helping here kid with her math homework and doesn't know how to do it. She needs to find what x equals. And an explanation to how its done so she can explain it to her kid.

    This is the equation

    (-3)(2x+4)=5(x-3)

    Thaks for the help 8)
    ISneezeFunny's Avatar
    ISneezeFunny Posts: 4,175, Reputation: 821
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    #2

    Apr 22, 2008, 11:43 PM
    (-3)(2x+4)=5(x-3)

    -6x - 12 = 5x - 15

    -11x = -3

    hope no more explanation is needed.
    Washington1's Avatar
    Washington1 Posts: 798, Reputation: 36
    Senior Member
     
    #3

    Apr 23, 2008, 01:16 AM
    Got the same answer
    x=-3
    Nyorovita's Avatar
    Nyorovita Posts: 13, Reputation: 0
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    #4

    Apr 23, 2008, 03:26 AM
    (-3)(2x+4) = 5(x-3)
    -6x-12 = 5x - 15 (Multify and remove brackets)
    -6x-5x = -15 +12 (Transfer of sides of like factors changes sign)
    -11x = -3
    x = 3 / 11 (Transfer of number and multiplication by -1)

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