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

/* code_begins */

{{{
x, y, z = var('x,y,z')
eq1 = 3*x - 7*y + 13*z == 32.4
eq2 = 9*y - 8*z == -25.3
eq3 = 7*z == 11.9

solve([eq1, eq2, eq3], x,y,z)}}}

/* code_ends */

 * '''Solution by''': 
  * ganesh, developer, space
  * bhanukiran, student, technical university of Delft
  * saransh, student, sobhit university