solve the following system of 3 linear equation in unknowns x, y and z? How do I accomplish this?

We are given the 3 formulas,

2x+3y+4z=43

5x+6y+7z=65

x+y=11

Answer 1

[ChristianW]

A = [2 3 4; 5 6 7; 1 1 0]; 
B = [43; 65; 11];
V = A\B;

Answer 2

[mehak]

A = [2 3 4; 5 6 7; 1 1 0];

B = [43; 65; 11];

V = A\B;

[Walter Roberson]

How does this differ from the 2013 answer by @ChristianW ?