Hello:)

Im trying now to make a program that does the same thing as BackwardSubstitutes in maple
I tried 2 things


I tried combining the matrix and the vector in the procedure but its not working

substitutioninverse := proc (matrice, vecteur)
local n, m, j, i, resultat, V, matrice2, a;
matrice2 := [matrice, vecteur];
m, n := Dimension(matrice2);
 V := Vector(m);
for i to m do
 resultat := 0;
for j from n to 1 do

Hello,
Im trying to make a program that does the same thing as RowOperation in maple but i dont know what to write to make it return the new matrix matrix
thats what i tried



rowoperation := proc (matrice, i, j, r)
 local m, n, k;
 m, n := Dimension(matrice);