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It is obviously clear that matrix A is singular (row 2 = -2*row 1), that is its columns are not linearly independent. This means that there is no inverse to A and hence trying X=A^(-1)*B won't work, which is probably the "normal" way of doing things. This either means that there is no solution to the system, or infinitely many solutions. I tried myself to solve it and ended up getting -2=3, which means there are no solutions to that equation.
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