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Math Help - simultaneous equations

  1. #1
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    simultaneous equations

    A + B = 1 Ax + By = 0 solve for A and B???
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  2. #2
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    The only choice for A and B is for both A and B to equal zero.
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  3. #3
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    Quote Originally Posted by Oiram View Post
    The only choice for A and B is for both A and B to equal zero.
    ? So A + B = 1 => 0 + 0 = 1 ....??
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  4. #4
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    Quote Originally Posted by crafty View Post
    A + B = 1 Ax + By = 0 solve for A and B???
    Substitute A = 1 - B into Ax + By = 0: (1 - B)x + By = 0 => x - Bx + By = 0 => x = B(x + y) => B = x/(x + y).

    Now get A.
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  5. #5
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    I'm sorry that misread the statement. I thought the statement was :
    A+B = 1Ax + By = 0. I didn't realize that they were two different equations.
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