A=[1,10,100,1000;1,15,225,3375;1,20,400,8000;1,22.5,506.25,11390.625];
b=[227.04;362.78;517.35;602.97];
n=length(b);
for k=1:n-1
for i=k+1:n
factor=A(i,k)/A(k,k);
A(i,k:n)=A(i,k:n)-factor*A(k,k:n);
b(i)=b(i)-factor*b(k);
endfor
endfor
A
x=zeros(n,1);
for i=n:-1:1
x(i)=(b(i)-A(i,i+1:n)*x(i+1:n))/A(i,i);
endfor
y=x(1)+x(2)*16+x(3)*16*16+x(4)*16*16*16;
disp(y)
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}
