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Thread: Having a brain fart.

  1. #1
    Trying to make mom and pop proud
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    Having a brain fart.

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    I know the answer, and I got the right answer, but I simply forgot some of the algebra that would allow me to get there. Can someone detailedly go through the algebra of this problem? I get the combining like terms part, and also get up to the part of getting a(b+c) + d(b+c) = 6. It's the just rest that where I get kind of hazy. And I'm writing this from memory, so I'm not quite sure if statement is really supposed to equal 6 or not. But I'm guessing that the actual numerical doesn't matter so much.



    What is the value of b+c?
    (1) ab+cd+ac+bd = 6

    (2) a + d = 4

  2. #2
    An Urch Guru Pundit Swami Sage
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    Re: Having a brain fart.

    (1) a(b+c) + d(b+c) = 6
    take (b+c) out
    (b+c) * (a+d) = 6.

    (2) (a+d) = 4

    combining 1 and 2, b+c = 6/4

  3. #3
    Within my grasp! fighter's Avatar
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    Re: Having a brain fart.

    Hello I am new to this group. Even I tried the same way mentioned by Mr Spiderman

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    An Urch Guru Pundit Swami Sage gmatguy's Avatar
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    Re: Having a brain fart.

    C it is

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