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

    Jul 15, 2012, 09:32 PM
    3x-y=4 and 7x-2y=10
    I need help with algebra substitution
    3x-y=4 and 7x-2y=10
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 15, 2012, 10:23 PM
    The shortest way would be to substitute the first equation into the second. And to do this, you will need to make y the subject of formula for the shortest way.

    Can you do that first?
    Cvholliday's Avatar
    Cvholliday Posts: 8, Reputation: 1
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    #3

    Jul 16, 2012, 04:08 AM
    Try transforming this equation : 3x-y=4 so that you have y=something. Then you can plug that y into the second equation and solve. I'll check back to see if you get that first part and help you through the rest :)
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