$0\mathrm{.}1$x$1+6$x$2-0\mathrm{.}4$x$3=-15\mathrm{.}5$

$0\mathrm{.}4$x$1-0\mathrm{.}3$x$2+8$x$3=51\mathrm{.}2$

$3$x$1-0\mathrm{.}1$x$2-0\mathrm{.}2$x$3=6\mathrm{.}2$

Develop a Matlab code that implements the naive Gauss Elimination method to solve linear algebraic equations.