||'''Book'''|| Advanced Engineering Mathematics ||
 ||'''Author'''|| Erwin Kreyszig ||
 ||'''Edition'''|| 8th Edition ||

/* code_begins */

{{{
A9= matrix([[-3,6,-9],[1,-4,3],[2,5,-7]]) 
b9= vector([-46.725,19.571,-20.073]) 
x9= A9.solve_right(b9) 
print x9 
}}}

/* code_ends */

 * '''Solution by''': 
   * Swati Ahuja, Student, IIT Roorkee