11: Solve matrix equation Ax=b

Solve Ax=b (and check the solution) given that

A =

1   2   0
2   5  -1
4  10  -1

b =

7
8
9

Mathematica: `A = , , } b = x = LinearSolve[ A, b ] A . x` (does equal b)	Matlab: *`A = [ 1 2 0 ; 2 5 -1 ; 4 10 -1 ] b = [ 7 8 9 ] x = A\transpose(b) A x`** (does equal b)
Maple: `xxx`	IDL: `A = [ [1,2,0], [2,5,-1], [4,10,-1] ] b = [7,8,9] svd, transpose(A), w,u,v svbksb, u,w,v,b,x print, x print, x # A` (does equal b)