How to correctly present results of linear equation with f print f function?

% A
syms x1 x2 x3 % Defining the vairables 
eqns = [x1 - 2*x2 + x3 == 0, % First equation
    2*x2 - 8*x3 == 8,	% Second equation
    -4*x1 + 5*x2 + 9*x3 == -9]; % Third equation
[A] = equationsToMatrix(eqns) % Forming the coefficient matrix

A = 

% B
syms x1 x2 x3
eqns = [x1 - 2*x2 + x3 == 0, 
    2*x2 - 8*x3 == 8,
    -4*x1 + 5*x2 + 9*x3 == -9];
[A,b] = equationsToMatrix(eqns) % Forming the augumented matrix

A = 

b = 

% C
A = [1 -2 1;
    0 2 -8;
    -4 5 9]

A = 3×3

1 -2 1 0 2 -8 -4 5 9

b = [0; 8; -9]

b = 3×1

0 8 -9

[L, U, P] = lu(A) % L = all multipliers, U = upper triangular matrix,  P = row interchanges

L = 3×3

1.0000 0 0 0 1.0000 0 -0.2500 -0.3750 1.0000

U = 3×3

-4.0000 5.0000 9.0000 0 2.0000 -8.0000 0 0 0.2500

P = 3×3

0 0 1 0 1 0 1 0 0

y = L\(P*b) % Forward substitution 

y = 3×1

-9.0000 8.0000 0.7500

x = U\y % Backward substitution

x = 3×1

29 16 3

How can I present the result (x) correctly with the fprintf function?

Answer 1

[Walter Roberson]

fprintf('%5g\n', x)