You only asked to solve the specific problem given, not a general problem, so the answer is x =4 and y=5. Rephrase your question please.
Solves the example only, but not the general case.
I have introduced a few more tests so this non-general solution is no longer valid. Thanks.
Well, this works here, but numerically this is a bad idea of solving a linear equation system.
Find the sum of all the numbers of the input vector
Swap the first and last columns
Swap the input arguments
Divide by 4
Flip the main diagonal of a matrix
Is this matrix orthogonal?
Create a square matrix of multiples
Find the "ordinary" or Euclidean distance between A and Z
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