3 thoughts on “Algebra – 8

  1. 11x+7y = 100

    7y = 100 – 11x

    y = 14 – x – ( 4x -2)/7, since y is integer, so (4x-2) should be divisible by 7… dis approach works well for such cases…

  2. for 11x+7y = 100, after getting a solution (4,8) , how can you surely say that for getting a next solution x has to be decreased and y has to be increased…?It can be a reverse too..?

    • No, because we observed the pattern above. And think about it, if the total has to remain the same, then if one part is increased the other must be decreased…

      regards
      J

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