Question 1047888
{{{(matrix(2,3,-6,6,-36,3,-3,18))}}}
~{{{(matrix(2,3,1,-1,6,3,-3,18))}}},    {{{(-1/6)*R[1]}}}

~{{{(matrix(2,3,1,-1,6,1,-1,6))}}},     {{{(1/3)*R[2]}}}

~{{{(matrix(2,3,1,-1,6,0,0,0))}}},     {{{1*R[2]+R[2]}}}


===> x-y = 6, and the solution is the set of all ordered pairs (x,y) such that y= x-6.