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    sargon's Avatar
    sargon Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jan 26, 2008, 10:45 AM
    solve math equation
    solve for x:

    5 (to the power x + 3 ) minus (5 to the power x+1) =600
    s_cianci's Avatar
    s_cianci Posts: 5,472, Reputation: 760
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    #2

    Jan 26, 2008, 10:53 AM
    Factor out 5^(x + 1) from the left side of your equation. Then it'll fall right into place.
    jiten55's Avatar
    jiten55 Posts: 105, Reputation: 8
    Junior Member
    		  
    #3

    Jan 26, 2008, 12:19 PM
    5^(x+3) - 5^(x+1) = 600

    5^(x+1) (5^2 -1) = 600

    5^(x+1) = 25

    x + 1 = 2

    x = 1
    eeseely's Avatar
    eeseely Posts: 100, Reputation: 3
    Junior Member
    		  
    #4

    Jan 27, 2008, 02:15 PM
    Eeseely Also Disagrees.
    PolluxCastor's Avatar
    PolluxCastor Posts: 117, Reputation: 5
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    #5

    Jan 27, 2008, 06:01 PM
    Edited.
    asterisk_man's Avatar
    asterisk_man Posts: 476, Reputation: 32
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    #6

    Jan 27, 2008, 07:18 PM
    jiten55 seems right to me. Substitute x=1 in and you'll see it's right.
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