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    ladydi14's Avatar
    ladydi14 Posts: 1, Reputation: 1
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    #1

    Jan 11, 2007, 04:52 PM
    algebra question
    what if an equation has 3 variables

    what is the answer?:confused:
    cool_dude's Avatar
    cool_dude Posts: 124, Reputation: 9
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    #2

    Jan 11, 2007, 05:00 PM
    Please give an example of an equation.

    When you say 3 variables do you mean 3 different variables or 3 the same variables?
    s_cianci's Avatar
    s_cianci Posts: 5,472, Reputation: 760
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    #3

    Jan 14, 2007, 02:16 PM
    Are you talking about a linear equation? Also, are you talking about a system of equations or a single equation? You have to give a little more specific information about your problem in order to be able to give you a definitive answer?
    junior111's Avatar
    junior111 Posts: 1, Reputation: 1
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    #4

    Jul 28, 2011, 03:20 PM
    A motorboat traveled for 2 hours with a 4mph current. The return trip against the same current took 10 hours. Find the speed of the motorboat in still water
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #5

    Jul 29, 2011, 08:12 AM

    junior: please do not tack a new qustion onto an old thread, especially if it has nothing to do with the original subject.

    To help get you started: if the speed of the boat in still water is x, then the speed of the boat when going with the current is x + 4 MPH, and when going against the current is x-4 MPH. The distance traveled in both cases is the same, which is equal to the speed of the boat multiplied by the time it takes. Can you take it from here?
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