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

/* code_begins */

{{{
x, y = var('x, y')
 solve([-2.5*x+4.2*y==0, 20.5*x-34.44*y==0], x, y) 
}}}

/* code_ends */

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