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Need help with relatively easy question

  1. Dec 19, 2004 #1
    Find integers A and B such that (4,1) and (-5,-3) are solitions to Ax + By = 7
     
  2. jcsd
  3. Dec 19, 2004 #2

    Zurtex

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    Plug them into x and y to get:

    4A + B = 7

    and

    -5A + -3B = 7

    And solve :smile:
     
  4. Dec 19, 2004 #3
    try putting the coefficients and answers into a matrix and Row reduce....

    oh... sorry, just finished a semester in Linear Algebra :-)

    but really... you have 2 equations that are equal to each other ad 2 unknowns... that is easy to solve just read the math book you have (I know, I know who reads a math book :-D )
     
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