# सूत्र ६. आनुरूप्ये शून्यमन्यत्

## (Sūtra 6. ānūrupye śūnayamanyat) - If one is in ratio, the other is zero. The Sūtra: ānūrupye śūnayamanyat (If one is in ratio, the other is zero) is used to solve simultaneous simple equations where the ratio of co-efficients of one of the variables are in ratio of the independent terms.

As an illustration, let us use this Sūtra to solve:
3x + 7y = 2
4x + 21y = 6
 Clearly, 7:21 = 1:3 And, 2:6 = 1:3  So, x = 0 (By the Sūtra) Substituting, we get: 0 + 7y = 2 or, y = 2/7
So, for a practitioner of Vedic Mathematics, for something like:
323x + 147y = 1615
969x + 321y = 4845
 Clearly, 323:969 = 1:3 And, 1615:4845 = 1:3  So, y = 0 (By the Sūtra) Substituting, we get: 323x + 0 = 1615 or, x = 5
Again, for something like:
12x + 78y = 12
16x + 96y = 16
 Clearly, 12:16 is the common ratio of the co-efficients of x and the independent contants.  So, y = 0 (By the Sūtra) Substituting, we get: 12x + 0 = 16 or, x = 4/3

This Sūtra also applies for more variables, say:
a1x + b1y + c1z = c1m
a2x + b2y + c2z = c2m
a3x + b3y + c3z = c3m
Then, x = y = 0

But, why does it work? For this Sūtra (ānūrupye śūnayamanyat), let us consider the following:
 Consider two equations, ax + by = bm cx + dy = dm  Then, dax + dby = dbm And, bcx + bdy = bdm Subtracting one from the other, we get: dax - bcx = 0 x (ad - bc) = 0 Thus, x = 0  Note that, similar proof may be provided for more variables.

Lastly, please remember that, as in any other form of mathematics, the mastery of Vedic Mathematics require practice and the judgement of applying the optimal method for a given scenario - a guideline of which, is presented in Applications »

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