Math

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consider the following linear equataion: 4x+11y=2011

How many solutions are there such that x and y are positive integer? (note the date 4/11/2011)

  • Math -

    There are 182 integer values of y that make 11 y between 0 and 2002
    The remainder values of 4x are:
    2011, 2000, 1989, 1978, 1967, 1956, 1945, 1934, 1923, 1912... . Those 4x values resulting in an integer for x are 2000 (for y = 1), 1956 (for y = 5), 1912 (for y = 9), ... and 20 for y = 181. There are 46 such values, and therefore 46 combinations.
    (x,y)
    ______
    (500,1)
    (489,5)
    (478,9)
    ......
    (5,181)

  • Math -

    nice explanation, i understand

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