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Math Help - Solving proportions while checking for extraneous solutions

  1. #1
    Newbie n_duncan2010's Avatar
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    Exclamation Solving proportions while checking for extraneous solutions

    i have this worksheet. from algebra and i forgot my book at school so i dont remember how to do part of the worksheet. The directons say Sovle the proportion. Check for extraneous solutions one of the equations is 7/3 = 8c/5 please help me!!!! anyone!!!!
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by n_duncan2010 View Post
    i have this worksheet. from algebra and i forgot my book at school so i dont remember how to do part of the worksheet. The directons say Sovle the proportion. Check for extraneous solutions one of the equations is 7/3 = 8c/5 please help me!!!! anyone!!!!
    7/3 = 8c/5 .......multiply both sides by 5
    => 5(7/3) = 8c
    => 35/3 = 8c ....divide both sides by 8
    => 35/24 = c

    check:

    8(35/24)/5 = (35/3)/5 = 35/3 * 1/5 = 7/3....check!

    so not sure why they'd ask you to check for extraneous solutions, there is only one solution i can see to this

    extraneous solutions usually occur if you have to do something like square both sides to get the answer, otherwise, you should be good
    Last edited by Jhevon; April 22nd 2007 at 12:06 PM.
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