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    matin_hawk's Avatar
    matin_hawk Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Dec 4, 2004, 08:08 PM
    how do you do these equations?
    -x+(5-x)=1
    and
    13-(-2x+)+8
    and
    3x-7(x-1)=-3(2x+3)
    CroCivic91's Avatar
    CroCivic91 Posts: 729, Reputation: 23
    Senior Member
    		  
    #2

    Dec 5, 2004, 05:34 AM
    -x+(5-x)=1
    is equal to
    -x+5-x=1
    is equal to
    5-2x=1
    now add 2x to the left and right and you get
    5=1+2x
    now subtract 1 from left and right
    2x=4
    now divide by 2
    x=2
    -----
    13-(-2x+)+8
    you must say what this should be equal to...
    -----
    3x-7(x-1)=-3(2x+3)
    is equal to
    3x-7x+7=-6x-9
    is equal to
    -4x+7=-6x-9
    now add 9 to both sides...
    -4x+16=-6x
    now add 4x to both sides
    16=-2x
    now divide by -2 and you get
    x=-8

    Kresho
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