Matrix d1 using coeff as given in cramer 's rule
d1 = [ [ coeff [ 0 ] [ 3 ] , coeff [ 0 ] [ 1 ] , coeff [ 0 ] [ 2 ] ] , [ coeff [ 1 ] [ 3 ] , coeff [ 1 ] [ 1 ] , coeff [ 1 ] [ 2 ] ] , [ coeff [ 2 ] [ 3 ] , coeff [ 2 ] [ 1 ] , coeff [ 2 ] [ 2 ] ] ] NEW_LINE