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

/* code_begins */

{{{
R2=matrix([[4,-1,0],[-1,4,-1],[0,-1,4]])
print R2
p2=vector([21,-45,33])
x2=R2.solve_right(p2)
print x2
}}}

/* code_ends */

 * '''Solution by''': 
   * <C.Pratyusha>, <Student>, <SNIST>
   * <Reepu Kumari>, <Student>, <SNIST>
   * <Y.Renuka>,<Student>,<SNIST>