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    danny15's Avatar
    danny15 Posts: 4, Reputation: 1
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    #1

    Sep 30, 2008, 08:36 PM
    algerbraic proof
    1/5 (a+10) = -3
    01wendy77's Avatar
    01wendy77 Posts: 2, Reputation: 1
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    #2

    Oct 1, 2008, 12:35 AM
    Prob too late but I came up with -66? Use the distributive law for 1/5. Multiply the recipocal and you're left with a= -66
    colbtech's Avatar
    colbtech Posts: 748, Reputation: 66
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    #3

    Oct 1, 2008, 06:19 AM
    my skool maths isn't what it used to be...

    but 1/5 = 0.2 so,

    0.2*a + 0.2*10 = -3 (multiply the brackets)

    0.2a + 2 = -3
    0.2a = -5 (subtract 2 from both sides)

    a = -25 (multiply both sides by 5)

    It has been a few years though.:)
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