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Proportional Coefficients Method

 

Sutra : Aanurupye Shoonyam Anyat

Meaning : If one is in ratio, the other one is zero.

        We can understand this sutra better by following the given example.

            12x - 5y = 21

            36x + 7y = 63

      Here we find that the ratio of  x coefficients is equal to that of the independent terms. In such cases, according to the sutra, the other variable ( in this case y ) is zero. This yields two simple equations in x which give same value for x.

       i.e.          y = 0

                    12x = 21  ,        36x = 63

     =>  x = 21/12 = 7/4     ,    x = 63/36 = 21/12 = 7/4


Some more examples :

1)    6x + 5y =  10

       8x + 15y = 30

     Here we find     5/15 = 10/30 = 1/3

    Hence from the sutra we have x = 0 and

           5y = 10    ,       15y = 30

        --> y = 2

     Hence x = 0 and y = 2.


2)   499x + 172y = 212

      9779x + 387y = 477

   Here   172/387 = ( 4*43)/( 9*43) = 4/9

              212/477 = ( 4*53)/ ( 9*53) = 4/9

   Hence from the sutra we have x = 0,

           172y = 212           ,           387y = 477

     -- >  y = 53/43


NOTE : This rule is also capable of infinite extension and may be extended to any number of unknown quantities.

 Example :

               Ax + Hy +Jz = A*K

               Bx + Dy + Ez = B*K

               Cx + Fy + Gz = C*K

                                                 (Where K is a constant)

       -->  y = 0 ,  z = 0

      Ax = A*K   ,     Bx = B*K  ,        Cx = C*K

      -->   x = K

 Hence  x = K,   y = 0,    z = 0.


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