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

/* code_begins */

{{{
B=matrix([[13,12],[-4,7],[11,-13]]) # Coefficients of the variables
print 'Matrix=\n',B
b = vector([-6,-73,157]) 
sol = B.solve_right(b)# Solution of the Matrix
B * sol
x, y = var('x, y')
print "\nResult of the Expressions:"
solve([13*x+12*y==-6,
       -4*x+7*y==-73,
      11*x-13*y==157], x, y)# Displaying the Values of x and y
}}}

/* code_ends */

 * '''Solution by''': 
   * Goheja Mahesh S, Diploma Student, Pravara Polytechnic Loni-413637