11: Solve matrix equation Ax=b

1   2   0
2   5  -1
4  10  -1

7
8
9

A = , , }
b =
x = LinearSolve[ A, b ]
A . x     (does equal b)

A = [ 1 2 0 ; 2 5 -1 ; 4 10 -1 ]
b = [ 7 8 9 ]
x = A\transpose(b)
A * x     (does equal b)

xxx

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)