||'''Book'''|| Linear Algebra ||
 ||'''Author'''|| Gilbert Strang ||
 ||'''Edition'''||  ||

/* code_begins */

{{{
a=matrix([[2,1,0,0],[1,2,1,0],[0,1,2,1],[0,0,1,2]])
b=vector([0,0,0,5])
x=a.solve_right(b)
print x
}}}

/* code_ends */

 * '''Solution by''': 
   * <sarada>, <student>, <prakasam>
   * <ananthalakshmi>, <student>, <prakasam>